AS568 O-Ring Size Chart & Dash Number Database
Complete AS568 size chart with dash numbers and precise dimensions for all standard O-rings. Our AS568 dash number database includes 200+ size specifications with cross-sections, inside diameters, and tolerances. Access the official AS568 size chart trusted by engineers for accurate dash number to dimensions conversion. Our size chart supports Parker AS568 cross-reference and military standard specifications.
AS568 Size Calculator & Conversion Tools
Professional dash number conversion tools and size chart calculators for AS568 standard applications. Convert dimensions to dash numbers, Parker AS568 equivalents, and military standard specifications.
AS568 Size Calculator
Enter dimensions to find the correct AS568 dash number. Our calculator matches your ID, OD, and cross-section to the exact dash number in our size chart.
Includes Parker AS568 cross-reference and military standard conversion
Metric to AS568 Converter
Convert metric O-ring dimensions to AS568 dash numbers. Our conversion tool handles ISO 3601 to AS568 size chart conversion with precision.
ISO 3601 to AS568 conversion with size chart reference
Complete Size Database
Comprehensive AS568 aerospace standard database with all 200+ standard O-ring sizes, precise dimensional specifications, and tolerance data verified against AS568D current revision.
- ✓AS568-001 to AS568-475 complete range
- ✓Dimensional tolerances per AS568D standard
- ✓Cross-section range: 0.070" to 0.275"
Cross-Reference System
Accurate cross-reference data linking AS568 standard sizes to Parker 2-series, National Oil Seal, SKF, and other major manufacturer part numbers for seamless procurement and replacement. Our comprehensive size chart includes Parker AS568 dash number conversion tables and military standard equivalents for defense applications. Each dash number in our size chart provides complete Parker AS568 cross-reference data.
- ✓Parker 2-series equivalents
- ✓National, SKF manufacturer codes
- ✓ISO 3601-1 metric equivalents
Groove Design Calculator
Professional groove design calculations for static and dynamic applications with recommended groove dimensions, surface finish requirements, and installation guidelines per AS568 standard. Our calculator supports dash number to groove dimension conversion, Parker AS568 size chart integration, and military standard groove specifications. Complete conversion tools for all dash number applications.
- ✓Static sealing groove calculations
- ✓Dynamic application sizing
- ✓Surface finish specifications
AS568 Aerospace Standard Overview
The AS568 size chart defines precision O-ring dimensions and dash numbers used throughout aerospace, automotive, and industrial applications. Each AS568 dash number corresponds to specific dimensions including inside diameter and cross-section. This comprehensive size chart with dash numbers ensures interchangeability - when you specify an AS568 dash number, the dimensions are standardized across all manufacturers worldwide. Our size chart includes Parker AS568 equivalents and military standard conversions for enhanced compatibility.
Current Revision AS568D
Latest Standard Specification
The AS568D revision provides the most current dimensional specifications, tolerance requirements, and material guidelines for O-ring sealing applications across all industries.
Complete Size Coverage
AS568-001 to AS568-475
Comprehensive coverage of all standard AS568 sizes from micro-miniature applications (0.029" ID) to large industrial sealing (18.890" ID) with five distinct cross-section series.
Precision Tolerances
±0.003" to ±0.024" Range
Tight dimensional tolerances ensure consistent sealing performance with inner diameter tolerances from ±0.005" to ±0.024" and cross-section tolerances from ±0.003" to ±0.005" depending on size.
AS568 Cross-Section Series Guide
AS568 standard organizes O-ring sizes into five distinct cross-section series, each optimized for specific application requirements and pressure ratings. Understanding cross-section selection is critical for achieving optimal sealing performance, proper compression ratios, and reliable service life in your application.
Micro Series (AS568-001 to 049)
Ultra-fine cross-section for precision instruments, electronics, medical devices, and miniature hydraulic systems. Ideal for space-constrained applications requiring reliable sealing.
Small Series (AS568-102 to 178)
Compact cross-section perfect for pneumatic systems, light hydraulics, and general-purpose sealing applications. Excellent balance of size and sealing capability.
Standard Series (AS568-201 to 284)
Most commonly used cross-section for hydraulic systems, automotive applications, and industrial machinery. The industry workhorse providing reliable sealing for standard pressure applications.
Medium Series (AS568-309 to 395)
Heavy-duty cross-section designed for high-pressure hydraulic systems, aerospace applications, and industrial equipment requiring enhanced sealing performance under demanding conditions.
Large Series (AS568-425 to 475)
Maximum cross-section for large bore sealing, industrial machinery, and applications requiring the highest sealing force and durability. Designed for the most demanding sealing challenges.
Most Popular AS568 Dash Numbers & Size Chart
These popular AS568 dash numbers are the most frequently specified across all industries. Our size chart shows these common dash numbers with corresponding dimensions - from AS568-006 to AS568-395. These dash numbers represent over 80% of all O-ring orders and their dimensions are readily available from stock. This dash number size chart includes Parker AS568 equivalents and supports military standard conversion for defense contractors. Each dash number entry in our size chart provides instant dimension lookup and conversion data.
| AS568 Size | Inside Diameter | Outside Diameter | Cross Section | Parker Equivalent | Typical Applications |
|---|---|---|---|---|---|
| AS568-214 In Stock | 2.234" (56.74mm) | 2.512" (63.80mm) | 0.139" (3.53mm) | Parker 2-214 | Hydraulic cylinders, automotive systems |
| AS568-210 In Stock | 0.739" (18.77mm) | 1.017" (25.83mm) | 0.139" (3.53mm) | Parker 2-210 | Pneumatic applications, general sealing |
| AS568-220 Low Stock | 1.239" (31.47mm) | 1.517" (38.53mm) | 0.139" (3.53mm) | Parker 2-220 | Industrial pumps, valve sealing |
| AS568-325 Made to Order | 2.734" (69.44mm) | 3.154" (80.11mm) | 0.210" (5.33mm) | Parker 2-325 | Heavy-duty hydraulics, aerospace |
| AS568-110 In Stock | 0.362" (9.19mm) | 0.568" (14.43mm) | 0.103" (2.62mm) | Parker 2-110 | Small hydraulics, pneumatic fittings |
| AS568-112 Low Stock | 0.487" (12.37mm) | 0.693" (17.60mm) | 0.103" (2.62mm) | Parker 2-112 | Automotive fuel systems, general use |
AS568 Technical Specifications & Tolerances
Precise dimensional specifications and tolerance requirements for AS568 standard O-rings. These specifications ensure interchangeability between manufacturers and reliable sealing performance across all applications. All dimensions follow AS568D current revision standards. Our size chart provides complete dash number specifications with conversion data for Parker AS568 equivalents and military standard requirements. Each dash number includes comprehensive dimension conversion tables.
| Cross Section | Metric Equivalent | Size Range | ID Tolerance | CS Tolerance | Groove Width (Static) | Groove Depth |
|---|---|---|---|---|---|---|
| 0.070" | 1.78mm | AS568-001 to 049 | ±0.005" | ±0.003" | 0.105" | 0.053" |
| 0.103" | 2.62mm | AS568-102 to 178 | ±0.005" to ±0.007" | ±0.003" | 0.138" | 0.077" |
| 0.139" | 3.53mm | AS568-201 to 284 | ±0.007" to ±0.010" | ±0.004" | 0.174" | 0.103" |
| 0.210" | 5.33mm | AS568-309 to 395 | ±0.009" to ±0.015" | ±0.005" | 0.245" | 0.155" |
| 0.275" | 6.99mm | AS568-425 to 475 | ±0.012" to ±0.024" | ±0.005" | 0.310" | 0.200" |
Note: All specifications conform to AS568D standard. Groove dimensions shown are for static sealing applications. Dynamic sealing requires different groove specifications. Consult our engineering team for specific application requirements.
AS568 Material Selection Guide
All AS568 standard sizes are available in a comprehensive range of elastomer materials to meet diverse application requirements. Material selection is critical for achieving optimal sealing performance, chemical compatibility, temperature resistance, and service life in your specific application environment.
NBR (Nitrile Rubber)
Temperature Range: -40°F to +248°F (-40°C to +120°C)
Excellent oil and petroleum resistance make NBR the preferred choice for hydraulic systems, automotive applications, and general industrial sealing. Available in durometer ranges from 40-95 Shore A.
FKM (Viton) Fluorocarbon
Temperature Range: -4°F to +428°F (-20°C to +220°C)
Superior high-temperature and chemical resistance for demanding aerospace, automotive, and chemical processing applications. Excellent performance with aggressive chemicals and fuels.
EPDM Ethylene Propylene
Temperature Range: -67°F to +302°F (-55°C to +150°C)
Outstanding weather, ozone, and steam resistance make EPDM perfect for water systems, outdoor equipment, automotive brake systems, and HVAC applications.
Silicone (VMQ)
Temperature Range: -67°F to +482°F (-55°C to +250°C)
Exceptional temperature range and biocompatibility make silicone ideal for food processing, medical devices, pharmaceutical applications, and extreme temperature environments.
Why Engineers Trust AS568 Standard O-Rings
✓ Universal Interchangeability
AS568 standard ensures perfect interchangeability between manufacturers worldwide. Any AS568-214 from any certified supplier will have identical dimensions, enabling global sourcing flexibility and supply chain security.
✓ Precision Engineering
Tight dimensional tolerances and quality control standards ensure consistent sealing performance. ID tolerances as tight as ±0.005" and cross-section tolerances to ±0.003" guarantee reliable operation.
✓ Comprehensive Size Range
Complete coverage from micro-miniature (0.029" ID) to large industrial (18.890" ID) applications. Five cross-section series provide optimal solutions for every pressure and space requirement.
✓ Industry Proven Reliability
Decades of proven performance in aerospace, automotive, hydraulic, and industrial applications. Trusted by NASA, Boeing, General Motors, and thousands of engineering teams worldwide.
Professional O-Ring Manufacturer - AS568 Stock & Custom
No MOQ
Order even 1 piece! All AS568 sizes available for single piece purchase. No bulk requirements.
Popular Materials In Stock
NBR 70/80/90°A, FKM 75/90°A, EPDM 70°A in stock. 1-3 days fast shipping for urgent needs.
Custom Size Stock Advantage
Large stock of custom AS568 size molds. No tooling fees. 7-15 days delivery. Save time and cost.
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Direct factory pricing without middlemen. Bulk discounts available. Save 20-40% on costs.
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Professional small package delivery. 500+ enterprise customers worldwide. DHL/FedEx/UPS options.
Full Custom Capability
Any material/hardness/color/size customization. 15 years manufacturing experience. Professional engineering support.
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Greater quantities, better discounts. Factory direct pricing advantages.
AS568 Standard O-Rings - Get Factory Quote
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