8 √ Pressure G2 Two Parbak Rings Clearance (extrusion gap). The static o-ring design means it’s a sealant for pipes that will not be moving. 367 sizes and follows ISO 3601-1 very closely (with a few extra sizes). O-ring sire. O-Ring Durometer. This metric o-ring groove design reference guide will help you find the right radius, back-up, pressure and other o-ring dimensions for basic applications. Parker Seal-Lok fittings feature a captive O-ring groove. O-Ring Size Charts USA Parker 2- AS568A, JIS Japanese, Common Metric, BS British : Groove Design Assistance Groove Design Charts and Considerations : Material Comparison Guide Elastomer Materials vs. R R1 Finishes are RMS values O-Ring Dovetail Grooves Radius “R” is CRITICAL. Modifications to. With the existing grooves created. Please contact Greene Tweed engineering for help or advice if required as some applications are difficult to optimize both at ambient and operating temperatures. X-rings are offered in AS568 and Metric sizes. Technical Handbook O-rings Quad-Rings®/X-Rings Gland Design Static/Dynamic (METRIC) The following table shows the groove dimensions for Quad-Rings®/ X-Rings. 5" inside diameter. DESCRIPTION: 36 USA X-RING SIZES 226 TOTAL X-RINGS. One of the keys to creating a functional o-ring seal involves evaluation of o-ring volume and groove volume. For a face seal: a compression ratio of 20-30%. It is the most common and most widely known type of seal in use today. For additional information about O-ring and back-up ring materials, refer to Materials and about extrusion, refer to Gap extrusion. In order to seal properly, the o-ring has to deform in the application by being compressed and stretched in any number of ways. Tight-tolerance wear rings allow for a more precise fit of components, resulting in less dimensional “play. METRIC DOVETAIL GROOVE DESIGNS. International O-Ring Size Cross Reference Table. 003 Max. com - The Online O-Ring Connection. Dynamic o-rings with rod and piston gland designs are used for most basic dynamic applications. The Surface Finish X, groove top and bottom: For liquids X= 32 micro inches. For vacuum and gases X=16 micro inches. We provide O-rings for practically any application and offer several design resources to help you design a custom AS568 O-ring seal that meets your exact requirements. Standard USA X-Rings sizes. This dynamic o-ring groove design guide for rod and piston glands will help you find the. The angled face must face to the inside of the groove for it to retain the o-ring when the o-ring is streched into the groove. We have included Static, dynamic, and pneumatic applications. Housing groove width. Female or Tube - the O-ring groove is located in the housing or cylinder and a tube is installed through the O-ring l. thermal expansion of the groove and the O-ring. Refer to our o-ring sizing charts for the most commonly used sizes around the world like; USA AS568 o-ring standard sizing chart, common metric o-ring sizing chart, Japanese JIS o-ring sizing chart, British BS o-ring sizing chart, quad-ring ® seals x-ring sizing charts,. The calculator takes all relevant. In order to seal properly, the o-ring has to deform in the application by being compressed and stretched in any number of ways. In most static applications, it is a direct replacement for an. If the O-ring size required is known, simply select the AS, BS or ISO standard (such as AS568) and enter the dash size reference. For standard sizes, aerospace standard AS568 and ISO 3601 for metric sizes are used to give the dimension and tolerance. Tolerances and. February 14, 2013. These metric o-ring groov design reference guide will help you find the right radius, back-up, press and other o-ring dimensions required basic applications. O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring. of O-ring O (see Table 4-1) O. O-ring sire. According to BS4518 the O-Ring reference number =. Housing groove width. free. . Thousands of non-standard sizes are available in stock or can be made within a few weeks typically without tooling fees so no need to settle for a less than optimal fit. Seal Design Guide. O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O-Ring Groove Design. 3. For O-rings with an I. For a rod (shaft) seal: Quad-Ring® Brand Groove Diameter = Min Shaft Diameter + (2 X Recommended Gland Depth) b. Material Assistant. Fax: 859-335-5128. ERIKS standard O-Rings. The conditions to formulate the design criteria are also described, e. BOSS SIZE KIT (20 BOSS SIZES 212PCS. O-Ring Groove design plays an important part in how an o-ring seals. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. Parker O-Ring Vacuum Sealing Guide is a comprehensive pdf document that provides technical information and best practices for designing and selecting o-ring seals for vacuum applications. The dovetail groove construction is only recommended for O-rings with bigger cross sections, . Browse design. 8 μm Ra) • Gland Dimensions Static Application-Face Seal. Fluorosilicone O-Rings FVMQ. The 4 bolt flange block fittings have through holes for the mounting bolts, again. 6mm, 2. EPDM O-Rings. Square Rings can be used in static applications where high sealing load force is required or when the sealing area is too thin to accommodate anything else. Select the type of O-ring groove - piston, rod, face seal or trapped seal. Fluorosilicone O-Rings FVMQ. Kalrez® O-Rings FFKM. A. 070 ± . Stop to Page. We're proud to offer the world's largest inventory of readily-available and highly customized sealing solutions. PRODUCT CLASS: O-RING KIT USA WAREHOUSE STYLE. When compressed between mating surfaces, an O-Ring blocks the passage of liquids or gases. 1. Chemraz® O-Rings FFKM. info. (0. AS568 Standard O-Ring. standard P. Use at your own risk. Contact Us for examples. $30 per line item minimum; Standard-sized O-rings are readily available in the following materials: Black Nitrile (Buna-N) 70 or 90, Brown or Black Viton® 75, Black EPDM 70, Red Silicone 70, Black Neoprene 70, and White PTFE. Anwendungsparameter & Materialauswahl. 53mm. Choose between more than 30 groove materials and 11 O-ring compounds! Benefit from a modern user friendly design and be guided from design rec-ommendations from info boxes. Whether your application conforms to U. This is beneficial for special applications where the O-ring has to be fixed by the groove e. One general guideline for good O-ring application and design is to maintain a range of % sqeeze on the O-ring (~10-40% for static and no more than 30% for dynamic). Please see our O’ring Size page for a comprehensive list of BS1806/AS568A, SAE and JIS metric sizes. Kalrez® O-Rings FFKM. com. BS 4518:1982 Specification for metric dimensions of toroidal sealing rings ('O'-rings) and their housings. Housing groove width. THE O-RING EXAMPLE Throughout this guide, the o-ring is used as an example in our discussion of seal design principles. D. DIN 3771 Size Chart. , seal squeeze and groove volume to accommodate O-ring swell. EMI-Shielded O-Rings and Seals. Compare o-ring material properties to find and buy the best o-rings compatible with your application environment. Download it for free and enhance your knowledge of sealing technology. CPD# or Material Description (Durometer, Color & Other Attributes) *. For rotary O-rings: a compression ratio of 0-10%. As a global innovator for industries ranging from aerospace to medical and everything in between, we're solving the world's toughest sealing challenges, one o-ring at a time. • If ®the Quad-Ring/X-Ring swells in the application, the groove width can be enlarged up to 15% max. Our groove design chart is a useful aid for selecting the right metric O-ring groove dimensions for your design. This groove design is rela-tively uncommon as it is expensive to machine and should not be used unless absolutely. The metric sizes are further broken down by region, notably Europe and Japan. Simriz® SZ485. Backup RingsDIN 3771 Metric O-Rings; NF T 47-501 Metric O-Rings; Backup Ring Size Chart; Metric Cross Reference; O-Ring Cord Tolerances; Metric O-Ring Tolerances; Oil Seal Size Chart; Materials . Step 3. A. Metric O-Ring Size Cross Reference Table. What's New. Use point 1 and point 3 and give the arc radius needed. Once thee find the concise metric o-ring him need, you can easily order online from the world's largest o-ring inventory network. ), and includes the Extended Sizes in the 400 Series. 8 μm Ra) groove sides: X. O’ring. USA Square Ring Size Chart; Common Metric O-Ring Size Chart; British O-Ring Size Chart; Japanese JIS O-Ring Size Chart; O-Ring Groove Design Reference Guides. D. A. )Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O-Ring Groove Design Dovetail; O-RING MATERIAL GUIDES. The Parker O-Ring eHandbook is a condensed online version of the printed Parker O-Ring Handbook ORD 5700. Section 3—Global O-Ring Size Reference Guide Inch and metric dimensions with tolerances for most major, global o-ring size standards can be found in. Standard AS-568 size Rubber Square Rings can sometimes be used interchangeably in AS-568 standard size O-Ring gland designs. Common Metric O-Ring Size Chart; British O-Ring Size Chart; Japanese JIS O-Ring Size Chart; O-Ring Groove Design Reference Guides. Groove fill of the installed O-ring should not be more than 85 % to. View our size chart. Use alternative seal shape, for example, in some long strokeUSA Square Ring Size Chart; Common Metric O-Ring Size Chart; British O-Ring Size Chart; Japanese JIS O-Ring Size Chart; O-Ring Groove Design Reference Guides. O-Ring Seals Groove Diameter (Rod Gland) Tolerance - . Experience the Future of O-Ring Measurement with Olypsys® O-Ring Back-Up Ring Sizes O-Ring Elastomers Custom Labeled and Packaged Solutions FDA and 3-A Sanitary O-Rings Food, Dairy & Water O-Ring Groove Chart Metric O-Ring Information ASTM Specifications O-Ring Groove Information - AS568 O-Ring Size Chart PDF O-Ring. Appendices 187. For additional information about O-ring and back-up ring materials, refer to Materials and about extrusion, refer to Gap extrusion. O-ring kits and accessories optimize the sealing performance of o-rings in a wide range of applications. O. Hydraulic sealing solutions for fluid power applications have become a priority in our continued product offering. The online O-Ring Calculator offers engineers and professionals a quick and easy way to calculate O-Ring dimensions and the appropriate housing layout in accordance with the international O-Ring standard ISO 3601. Tolerances and Surface Imperfections: 203-211. and load them also into your created design. Square Rings can be used in static applications where high sealing load force is required or when the sealing area is too thin to accommodate anything else. O-Ring Reference Number. thermal expansion of the groove and the O-ring. For vacuum and gases X=16 micro inches. AS568 Static O-Ring Axial Face Seal Glands (Link to: Metric O-Ring Groove Information) Static seals exist where there is no relative motion between the mating surfaces being sealed. Sizes and How to Order. The O-ring groove calculator enables engineers to specify an O-ring groove for any given O-ring or vice versa calculates the best suitable size O-ring for any given groove. Metric o-ring groove dimensions are listed for the most common metric cross sections with and without backup rings. If you have a custom O-ring size that does not appear on this chart, contact us directly and we can help you size your O. Displays the diameter of the selected cylindrical face, or No selected diameter. , Japanese JIS, British BS, or Common Metric sizing for o-rings, these o-ring size charts will help you locate the right o-ring size. g. CS=1. The groove design allows the O-ring to be retained in the face seal during assembly and maintenance. It also provides an overview of international sizes and standards, and compatibility data for fl uids,. This groove is difficult and expensive to machine, and the tolerances are especially critical. Explore some of the most common sealing materials we offer here. Yes they are BSPP. O-Ring inner diameter stretch, outer diameter squeeze. ) is for reference only. 30 2. Chemraz® O-Rings FFKM. Once you find the exact metric o-ring you need, you can. 1 OR O-rings in static radial sealing, metric sizes ID 2,9 – 17,3 mm Dimensions Dash-number Designation Outside groove Inside groove ID CS L R D d 1 d D 1 +0,2 max. O-Ring Design Considerations What to Know About O-Ring Squeeze, Stretch, Compression, and More . O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O. Low. oring51. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. Slipper seals 109 6. G = (Do-Di)/2. Since new designs. Standard and Metric Sizes ; Thousands of materials ; Find O-rings by size, temperature range, material type, compliance, and more ;For additional information about O-ring and back-up ring materials, refer to Materials and about extrusion, refer to Gap extrusion. This PDF catalog covers the design, materials, installation and applications of O-Rings and Back-up Rings, with detailed illustrations and tables. Es ist daher am besten, hier zu beginnen. com Author: seal and design Created Date:Learn more about Metric O-Ring Groove Design. Reset calculator. (Consider a Sizing Cone for small O-Rings under 2. Kalrez ® 6375. 070 ± . This Chart Calculator Specifies Groove design for o-ring sizes ranging from 0. Reset calculator. For additional information about O-ring and back-up ring materials, refer to Materials and about extrusion, refer to Gap extrusion. Worldwide O-Ring inventory network available online, manufacturer direct pricing with same day shipping. O-Ring Gland Fill % O-Ring Volume) / (Gland Volume) • Gland volume vs. O’ring Groove Design. g. In most static applications, it is a direct replacement for an. Sealing Elements Technical Handbook O-rings 1 All the information in this documentation has been compiled with the greatest of care. The reason such a large O-ring was chosen is (cross diameter = Ø0. Female or Tube - the O-ring groove is located in the housing or cylinder and a tube is installed through the O-ring l. D. deeper than the maximum radial. This is beneficial for special applications where the O-ring has to be fixed by the groove e. Quick reference guide training video to assist users in properly using the Parker O-Ring Handbook in selecting, sizing, installing and using o-rings. O-Ring Size Chart: 169-202: 16. The only time youTechnical Handbook O-rings 12 C. O-Rings are specified by I. D. Static o-ring inside and outside diameters, cross-sections and other dimensions are a fundamental component of o-ring performance. Markez® O-Rings FFKM. wider than the maximum piston ring width with a tolerance of +0. Ph: 859-269-2351. It is used in all types of applications and by a broad range of industries. Part Number Name Description; ORM0030-00249 FPM-75: METRIC O-RING . The metric sizes are further broken down by region, notably Europe and Japan. 1)ISO 3601. Use the metric o-ring size chart to find common metric o-ring sizes by cross section, inside diameter, and outside diameter. FlexiSeals® 21 5. Popular Sealing Material Families. Search. Any O-Ring Size. According to BS4518 the O-Ring reference number =. No less than 75% of the seal cross-section should be contained within the groove to ensure the seal does not “roll” or extrude out of the groove. We're proud to offer the world's largest inventory of readily-available and highly customized sealing solutions. The parameter dashboard in the Results section will immediately show you if the selected O-ring size is suitable for your. From o-ring kits to o-ring lubricants and sizing tools, here you'll find everything you need to install, maintain, and remove your o-rings. Chemraz® O-Rings FFKM. Because they can be expensive to machine, O-ring grooves should only be added when necessary or for metric O-rings with a cross-section larger than 3. Kalrez® O-Rings FFKM. Use this tool for designing new glands based upon desired o-ring sizing. I always take the fittings to our Hose room and grab a new BSPP hose crimp fitting and double check it threads all the way and locks. g. ” This allows the extrusion gap to be smaller for tight-tolerance wear rings, thusPTFE Seal Design Guide Parker Hannifin Corp. MS 28783 back-up rings match the dash numbers an AN 6230 O-rings. Bitte beachten Sie, dass einige Ihrer ausgewählten. chemical volume swell (%) cross section diameter (mm) ISO 3601. Dynamic o-rings are diverse, providing a wide range of uses, and selecting the right one for your application is key for achieving maximum o-ring performance. Common Metric O-Ring Size Chart; British O-Ring Size Chart; Japanese JIS O-Ring Size Chart; O-Ring Groove Design Reference Guides. Typical Axial Installation - Static °CThere are two main o-ring sizing types: standard and metric. 4mm. Common Metric O-Rings Sizes Tolerances var y by use, please see our tolerance pages. Thousands of common metric o-rings and non-standard o-rings in metric sizes are available in stock. We carry a full range of AS568 standard sizes, as well as metric sizes. World Class; Certifications; Contact Us; Call Us: Seal & Design Canada: Toronto, Ontario (416) 741-7005 Toll Free: 1-866-242-3770 Headquarters: Clarence, NY (716) 759-3344 Higbee Division: Syracuse, NYFor face seals, an o-ring is installed in a groove that is machined into a. Seal Design Guide. Thousands of common metric o-rings and non-standard o-rings in metric sizes are available in stock. Technical information for O-rings An O-ring is a sealing element used to reliably seal against fluids and gases. (A) is shown as a radius rather than a diameter. Quad™-rings Gland Design Static/Dynamic (METRIC) The following table shows the groove dimensions for Quad™-rings. Standard-sized O-rings are readily available in the following materials: Black Nitrile (Buna-N) 70 or 90, Brown or Black Viton® 75, Black EPDM 70, Red Silicone 70, Black Neoprene 70, and White PTFE. Seal & Design is a leading manufacturer and distributor of die cut gaskets, seals, o-rings, and molded rubber products. Readily available is common USA and metric cross-sections and nearly unlimited diameters. Choose between more than 30 groove materials and 11 O-ring compounds! Benefit from a modern user friendly design and be guided from design rec-ommendations from info boxes. O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston EMI-Shielded O-Rings and Seals. Dimensional tolerances for all AS568 o-rings offered by Global O-Ring and Seal are in accordance with ISO 3601-1A. ISO 3601-1 states two classes of O-rings: Class A and Class B. D. I. D. (fig. Create a sketch on the new Workplane and create an arc. 30 MM X 2. • Where differing amounts of compression effect the seal function (as with flat gaskets), an O-ring is not effected because metal to metal contact is generally allowed for. We are certified to meet 9001:2015 & AS9100D standards and serve a diverse customer base of manufacturers, distributors and catalog-houses. CPD# T1002 is FEP encapsulated Solid. After Hours Service . Standard was developed for use in the United States, while the international community uses metric sizes. should not exceed 3% of the rod gland diameter for O-rings with an I. For additional information about O-ring and back-up ring materials, refer to Materials and about extrusion, refer to Gap extrusion. The groove width dimensions are listed in. SAE MAP3440 - O-Ring Groove Design For Packing Preformed, Elastomeric O-Ring Seals, Static, Radial Squeeze, Metric March 1, 1990 - SAE This recommended practice provides the design criteria for static elastomeric O - ring seal applications, radial squeeze groove dimensions for aerospace metric O - ring seal sizes as specified in. O-Ring Assembling Conditions: 162-168: 15. To accommodate the additional back-up rings, the O-ring groove width L needs to be increased to L1 for one back-up ring or L2 for two back-up rings . O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O. Business-to-business sales only. (Premium Membership required) Preview: Groove design for o. Business-to-business sales only. For additional information about O-ring and back-up ring materials, refer to Materials and about extrusion, refer to Gap extrusion. This table is a reference to O-ring sizes for common housing dimensions. QUANTITY:• O-ring failure is normally gradual and easily identified. 60mm. Metric and Inch Cross Section thickness reference gauge. Consider replacing Rubber Square-Rings with O. Global O-Ring and Seal offers a large selection of metric o-ring sizes in various compounds. The conditions considered to formulate the design criteria are also described, e. O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O-Ring Groove Design. Male or Plug Seal design is based on the following factors (refer to fig. Aerospace Group. H P PRESSURE (P) FROM INSIDE 1 = ‘O’ Ring I. Our o-ring groove design guides list default o-ring groove dimensions for the most basic applications and are intended to be used with the following o-ring groove design considerations to engineer on o-ring gland to optimize specific. Standard USA size Rubber Square Rings can sometimes be used interchangeably in USA standard size O-Ring gland designs. AS568 Standard Inch O-Rings - Premium Grade Global Standard Metric O-Rings ISO3601 OSK™ Assorted O-Ring Kits Extruded Rubber O-Ring Cord Vulcanized O-Rings - Precision Tailored to Your Needs Olypsys® O-Ring Measurement Hydraulic Seals, Wipers, Rod Seals, Piston Seals, and Wear Rings ↪ Universal Rod/Piston U-Cups ↪ Loaded U. ISO 6149 specifies O-Rings designed for use in Metric Tube Fittings. Chemraz® O. Dimensions per AS568 although tolerances vary by use, please see our tolerance pages. AS568 O-Ring - Groove Design. Class B O-rings have slightly wider. O. Find the recommended O-ring size and gland dimensions in the appropriate design table in Static O-Ring Sealing or Dynamic O-Ring Sealing, Sections IV and V, respectively. For the non-3d printing information on O-rings, check out Machinery's handbook. Dovetail grooves are used to hold the O-ring in place during installation or maintenance. Once you’ve found the dovetail o-ring you need, you can quickly and easily order online from the world's largest o-ring inventory network. As important as the o’ring seal itself is the groove that the o’ring seats into. = B Min. 000 for all sizes 1. 1 Max. This static o-ring groove design guide will help you find the right rod and piston gland design for your application. An undercut or dovetail groove has proven beneficial in many applications to keep the o-ring in place. This metric o-ring groove design reference guide will help you find the right radius, back-up, pressure and other o-ring dimensions for basic applications. Size CS (IN) ID (IN) OD (IN) CS (MM) ID (MM) OD (MM) 0. Male or Plug Seal design is based on the following factors (refer to fig. com Online: applerubber. and Inside Diameter cross section. O-Ring Size Charts O-ring, x-ring and square. By simply entering installation specifications for an application, it recommends O-Ring sizes, housing layout and corresponding part. The O-ring groove dimensions require the O-ring to slightly stretch to achieve a sturdy O-ring fit in the groove, quite similar to a snap-fit joint. 001" (under 6"). The European valves seem to use bonded/dowty seals and coppers more often. EMI-Shielded O-Rings and Seals. The following information is a guide for o’ring. About Allied Please Used. The design of the groove where the o-ring sits plays a major role in how the o. This metric o-ring rill design reference leadership will help you find the right radius, back-up, pressure and other o-ring machine for basic applications. METRIC DOVETAIL GROOVE DESIGNS. Technical Handbook O-rings Quad-Rings®/X-Rings Gland Design Static/Dynamic (METRIC) The following table shows the groove dimensions for Quad-Rings®/ X-Rings. O-Ring Gland Design Information: 131-161: 14. O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O. 2487 RFQ. O-ring groove design is critical to the performance of the O-ring seal. Gland Design for Static Application for O-rings with Axial Squeeze. They are one of the most common and important elements of machine design. Polyurethane O-Rings. U. ThisPill Box Before O-ring design. O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O. Radius “R” is critical. Housing groove width. , Japanese JIS, British BS and Common Metric o-ring size charts. Estimated Annual Usage. This recommended practice provides the design criteria for static elastomeric O-ring seal applications, axial compression (face type) groove dimensions for aerospace metric O-ring sizes specified in MA2010. O-Ring Gland Design Considerations; Static O-Ring Groove Design Face Seal; Metric O-Ring Groove Design; Static O-Ring Groove Design Rod-Piston; Dynamic O-Ring Groove Design Rod-Piston; Static O. 1-24). Describes the groove. , Japanese JIS, British BS, or Common Metric sizing for o-rings, these o-ring size charts will help you locate the right o-ring size. The O-ring calculator tool is intended to form the basis of an o-ring installation, and assist with selection of o-ring and hardware dimensions. D. Transeals O-Ring Handbook - Free download as PDF File (. This interactive tool will walk you through calculating values for diameters, compression, tolerance and more for your custom seal application. Our O-rings are manufactured according to metric and imperial international standards such as AS 568B, DIN ISO 3601 and JIS. The dovetail groove construction is only recommended for O-rings with bigger cross sections, .