Standard Specifications
- Dimensional Standards: AS568, ISO 3601-1, DIN 3771, BS 1806, JIS B2401
- Cross-Section Diameters: 0.8 mm to 15.0 mm (Metric); 0.040" to 0.275" (Imperial)
- Inside Diameters: 0.5 mm up to 1,200 mm (Endless Moulded)
- Hardness Range: 40 to 90 Shore A durometer
- Manufacturing Methods: High-precision compression & transfer moulding
Industrial Precision O-Rings for Leak-Free Performance
O-rings represent the most versatile and cost-effective fluid seal in mechanical engineering. When properly engineered and installed, an elastomeric O-ring provides complete bi-directional fluid and gas isolation across static bolted flanges and dynamic sliding shafts.
Material Compounds Available
Technical Design Parameters
Our engineering team assists customers in determining the optimal gland geometry, groove fill percentage (typically 75% to 85%), and initial compression squeeze (15% to 25% for static seals; 8% to 15% for dynamic reciprocating applications) to prevent seal extrusion, spiral failure, or premature compression set.
Standard AS568 O-Ring Series Quick Reference
We stock and mould all standard dash numbers across the 5 imperial cross-section series:
| Series | Nominal Cross-Section | Actual Cross-Section (Inches) | Actual Cross-Section (mm) | Dash Number Range | Common Gland Depths |
|---|---|---|---|---|---|
| 000 Series | 1/16" | 0.070" ± 0.003" | 1.78 mm ± 0.08 mm | -001 to -050 | 1.25 mm to 1.40 mm |
| 100 Series | 3/32" | 0.103" ± 0.003" | 2.62 mm ± 0.08 mm | -102 to -178 | 1.95 mm to 2.15 mm |
| 200 Series | 1/8" | 0.139" ± 0.004" | 3.53 mm ± 0.10 mm | -201 to -284 | 2.65 mm to 2.90 mm |
| 300 Series | 3/16" | 0.210" ± 0.005" | 5.33 mm ± 0.13 mm | -309 to -395 | 4.15 mm to 4.50 mm |
| 400 Series | 1/4" | 0.275" ± 0.006" | 6.99 mm ± 0.15 mm | -425 to -475 | 5.50 mm to 5.95 mm |
Tell us what
you need.
Share your product specifications and our technical engineering team will prepare an itemized commercial quotation with lead times and material data.
Email your 2D/3D CAD drawings or technical datasheets directly to our sales team at sales@crpseals.com.
For urgent stock checks, standard O-ring sizes, or custom compound queries, chat directly with our team.
Chat on WhatsApp ↗