NBR, Silicone and FKM O-Rings — Exact AS568 Size and Compound Specification
AS568 Size Identification: Keep the Dash Number and Material Grade Together
| Order requirement |
Information to specify |
| Dimensional reference |
AS568 dash number and revision, or relaxed ID and cross-section with units and tolerance. |
| Compound |
Exact NBR, silicone or FKM grade matched to the fluid and temperature. |
| Hardness |
Shore A target and tolerance for the selected grade. |
| Gland and duty |
Sealing location, groove geometry, pressure cycle and static or moving contact. |
| Kit identification |
Part codes, quantity by size and compound-labelled packing to avoid mixing similar rings. |
Standard dimensions do not establish oil compatibility, gas-service suitability or an independent pressure rating. Confirm special service requirements for the compound and complete gland design. Joined cord rings, square rings and X-rings require their own specification.
NBR, silicone and FKM O-ring enquiries use an exact AS568 dash number and agreed standard revision, or specified ID and cross-section for custom sizes. The original AS-568A reference describes a dimensional specification, not an oil-resistance rating. Select the compound grade separately against the fluid and operating conditions.
| Material: |
NBR, silicone or FKM by selected grade; other polymers require separate specification. |
| Hardness |
40-90 Shore A enquiry range; agree target hardness and tolerance for the selected compound. |
| Mode of Production |
Moulding process and tooling by approved part design; joined cord rings and other polymers reviewed separately. |
| Production Capabilities |
Tooling, small-part handling and inspection requirements confirmed for the requested dimensions. |
| Size/Color |
The size and color can be custom as customer’s requirements |
More Pictures of the rubber O rings:
Application of the rubber o ring:
For equipment joints, specify fluid composition and additives, normal and peak temperature, pressure cycle and static or moving duty. NBR, silicone and FKM are alternative material families and are not interchangeable merely because the dimensions match. Review oil compatibility for the exact grade and assembly conditions.
Structure and sizes:
Rubber o rings samples corner view:
Other relative rubber products for oil drilling use:
Shanghai Qinuo Industry Co. Ltd supplies rubber, plastic and machined parts to agreed drawings. Our ISO 9001 quality management supports specification review and inspection. For AS568 O-rings, agree the dash number and revision, compound grade, hardness and inspection requirements with the order.
Packing and shipping:
1: Express: S.F. ,DHL,UPS, TNT, FedEx ect, for urgent and small order.
2: Air shipment: air port to air port or air port to door.
3: Sea shipment: suitable for bulk goods. it will takes more longer time than air shipment.
The steps of the production:
Welcome to contact us for more information.
Your message must be between 20-3,000 characters!
