Seals · AS 568

EPDM AS568 O-Rings (Inch Series)

Temperature range, chemical and fluid compatibility, hardness and the full dimensional range for this compound.

EPDM AS568 O-Rings (Inch Series) are supplied to ethylene-propylene-diene rubber, typically 70 Shore A. Corrosion behaviour is excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil, the material is non-magnetic, and the usable service range is approx. -45 °C to +150 °C. In practice this grade is the water, steam and outdoor-weathering elastomer.

Grade: ethylene-propylene-diene rubber, typically 70 Shore A
Corrosion resistance: Excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil
Magnetic response: Non-magnetic
Service temperature: approx. -45 °C to +150 °C

Property values are typical for the grade. Certified mechanical test data is available on request for production orders.

EPDM AS568 O-Rings (Inch Series) combine the dimensional form of AS 568 with the material properties of grade ethylene-propylene-diene rubber, typically 70 Shore A: excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil, non-magnetic, service range approx. -45 °C to +150 °C. This page summarizes the grade data, its corrosion behavior in service, the comparable grades, and the sizes supplied.

Why Choose EPDM for AS568 O-Rings (Inch Series)

The water, steam and outdoor-weathering elastomer. For as568 o-rings (inch series), this matters when excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil is the primary requirement.

Mechanical & Physical Properties

Grade designation	ethylene-propylene-diene rubber, typically 70 Shore A
Magnetic response	Non-magnetic
Service temperature	approx. -45 °C to +150 °C
Corrosion characteristic	Excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil

Galvanic & Galling Considerations

Galvanic and galling behavior do not apply to as568 o-rings (inch series) in EPDM — the relevant compatibility questions are chemical: confirm the elastomer against the fluid, the temperature and any cleaning agents in service, and check the gland or groove dimensions give the intended compression on the section.

Comparable Grades

For as568 o-rings (inch series), consider NBR for mineral oil and hydraulic service, which EPDM does not tolerate, or silicone for a wider temperature range in static duty. Elastomer selection is decided by the medium, the temperature range and whether the seal is static or dynamic — not by strength.

Sizes of AS568 O-Rings (Inch Series) Available in EPDM

Dash number	Inner diameter d1 (in)	Inner diameter d1 (mm)	Cross section CS (in)	Cross section CS (mm)	Groove width (mm)	Reference standard
AS568-001	0.029	0.74	0.040	1.02	1.42	AS 568
AS568-002	0.042	1.07	0.040	1.02	1.42	AS 568
AS568-003	0.056	1.42	0.040	1.02	1.42	AS 568
AS568-004	0.070	1.78	0.040	1.02	1.42	AS 568
AS568-005	0.101	2.57	0.040	1.02	1.42	AS 568
AS568-006	0.114	2.90	0.070	1.78	2.49	AS 568
AS568-007	0.145	3.68	0.070	1.78	2.49	AS 568
AS568-008	0.176	4.47	0.070	1.78	2.49	AS 568
AS568-009	0.208	5.28	0.070	1.78	2.49	AS 568
AS568-010	0.239	6.07	0.070	1.78	2.49	AS 568
AS568-011	0.301	7.65	0.070	1.78	2.49	AS 568
AS568-012	0.364	9.25	0.070	1.78	2.49	AS 568
AS568-013	0.426	10.82	0.070	1.78	2.49	AS 568
AS568-014	0.489	12.42	0.070	1.78	2.49	AS 568
AS568-015	0.551	14.00	0.070	1.78	2.49	AS 568
AS568-016	0.614	15.60	0.070	1.78	2.49	AS 568
AS568-017	0.676	17.17	0.070	1.78	2.49	AS 568
AS568-018	0.739	18.77	0.070	1.78	2.49	AS 568
AS568-019	0.801	20.35	0.070	1.78	2.49	AS 568
AS568-020	0.864	21.95	0.070	1.78	2.49	AS 568
AS568-021	0.926	23.52	0.070	1.78	2.49	AS 568
AS568-022	0.989	25.12	0.070	1.78	2.49	AS 568
AS568-023	1.051	26.70	0.070	1.78	2.49	AS 568
AS568-024	1.114	28.30	0.070	1.78	2.49	AS 568
AS568-025	1.176	29.87	0.070	1.78	2.49	AS 568
AS568-026	1.239	31.47	0.070	1.78	2.49	AS 568
AS568-027	1.301	33.05	0.070	1.78	2.49	AS 568
AS568-028	1.364	34.65	0.070	1.78	2.49	AS 568
AS568-029	1.489	37.82	0.070	1.78	2.49	AS 568
AS568-030	1.614	41.00	0.070	1.78	2.49	AS 568

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

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Specification

Item / category Standard Size(s) Material / finish Quantity

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Notes

Dimensions & Specifications (AS 568)

Dash number	Inner diameter d1 (in)	Inner diameter d1 (mm)	Cross section CS (in)	Cross section CS (mm)	Groove width (mm)	Reference standard
AS568-001	0.029	0.74	0.040	1.02	1.42	AS 568
AS568-002	0.042	1.07	0.040	1.02	1.42	AS 568
AS568-003	0.056	1.42	0.040	1.02	1.42	AS 568
AS568-004	0.070	1.78	0.040	1.02	1.42	AS 568
AS568-005	0.101	2.57	0.040	1.02	1.42	AS 568
AS568-006	0.114	2.90	0.070	1.78	2.49	AS 568
AS568-007	0.145	3.68	0.070	1.78	2.49	AS 568
AS568-008	0.176	4.47	0.070	1.78	2.49	AS 568
AS568-009	0.208	5.28	0.070	1.78	2.49	AS 568
AS568-010	0.239	6.07	0.070	1.78	2.49	AS 568
AS568-011	0.301	7.65	0.070	1.78	2.49	AS 568
AS568-012	0.364	9.25	0.070	1.78	2.49	AS 568
AS568-013	0.426	10.82	0.070	1.78	2.49	AS 568
AS568-014	0.489	12.42	0.070	1.78	2.49	AS 568
AS568-015	0.551	14.00	0.070	1.78	2.49	AS 568
AS568-016	0.614	15.60	0.070	1.78	2.49	AS 568
AS568-017	0.676	17.17	0.070	1.78	2.49	AS 568
AS568-018	0.739	18.77	0.070	1.78	2.49	AS 568
AS568-019	0.801	20.35	0.070	1.78	2.49	AS 568
AS568-020	0.864	21.95	0.070	1.78	2.49	AS 568
AS568-021	0.926	23.52	0.070	1.78	2.49	AS 568
AS568-022	0.989	25.12	0.070	1.78	2.49	AS 568
AS568-023	1.051	26.70	0.070	1.78	2.49	AS 568
AS568-024	1.114	28.30	0.070	1.78	2.49	AS 568
AS568-025	1.176	29.87	0.070	1.78	2.49	AS 568
AS568-026	1.239	31.47	0.070	1.78	2.49	AS 568
AS568-027	1.301	33.05	0.070	1.78	2.49	AS 568
AS568-028	1.364	34.65	0.070	1.78	2.49	AS 568
AS568-029	1.489	37.82	0.070	1.78	2.49	AS 568
AS568-030	1.614	41.00	0.070	1.78	2.49	AS 568
AS568-031	1.739	44.17	0.070	1.78	2.49	AS 568
AS568-032	1.864	47.35	0.070	1.78	2.49	AS 568
AS568-033	1.989	50.52	0.070	1.78	2.49	AS 568
AS568-034	2.114	53.70	0.070	1.78	2.49	AS 568
AS568-035	2.239	56.87	0.070	1.78	2.49	AS 568
AS568-036	2.364	60.05	0.070	1.78	2.49	AS 568
AS568-037	2.489	63.22	0.070	1.78	2.49	AS 568
AS568-038	2.614	66.40	0.070	1.78	2.49	AS 568
AS568-039	2.739	69.57	0.070	1.78	2.49	AS 568
AS568-040	2.864	72.75	0.070	1.78	2.49	AS 568
AS568-041	2.989	75.92	0.070	1.78	2.49	AS 568
AS568-042	3.239	82.27	0.070	1.78	2.49	AS 568
AS568-043	3.489	88.62	0.070	1.78	2.49	AS 568
AS568-044	3.739	94.97	0.070	1.78	2.49	AS 568
AS568-045	3.989	101.32	0.070	1.78	2.49	AS 568
AS568-046	4.239	107.67	0.070	1.78	2.49	AS 568
AS568-047	4.489	114.02	0.070	1.78	2.49	AS 568
AS568-048	4.739	120.37	0.070	1.78	2.49	AS 568
AS568-049	4.989	126.72	0.070	1.78	2.49	AS 568
AS568-050	5.239	133.07	0.070	1.78	2.49	AS 568
AS568-102	0.049	1.24	0.103	2.62	3.66	AS 568
AS568-103	0.081	2.06	0.103	2.62	3.66	AS 568
AS568-104	0.112	2.84	0.103	2.62	3.66	AS 568
AS568-105	0.143	3.63	0.103	2.62	3.66	AS 568
AS568-106	0.174	4.42	0.103	2.62	3.66	AS 568
AS568-107	0.206	5.23	0.103	2.62	3.66	AS 568
AS568-108	0.237	6.02	0.103	2.62	3.66	AS 568
AS568-109	0.299	7.59	0.103	2.62	3.66	AS 568
AS568-110	0.362	9.19	0.103	2.62	3.66	AS 568
AS568-111	0.424	10.77	0.103	2.62	3.66	AS 568
AS568-112	0.487	12.37	0.103	2.62	3.66	AS 568
AS568-113	0.549	13.94	0.103	2.62	3.66	AS 568
AS568-114	0.612	15.54	0.103	2.62	3.66	AS 568
AS568-115	0.674	17.12	0.103	2.62	3.66	AS 568
AS568-116	0.737	18.72	0.103	2.62	3.66	AS 568
AS568-117	0.799	20.29	0.103	2.62	3.66	AS 568
AS568-118	0.862	21.89	0.103	2.62	3.66	AS 568
AS568-119	0.924	23.47	0.103	2.62	3.66	AS 568
AS568-120	0.987	25.07	0.103	2.62	3.66	AS 568
AS568-121	1.049	26.64	0.103	2.62	3.66	AS 568
AS568-122	1.112	28.24	0.103	2.62	3.66	AS 568
AS568-123	1.174	29.82	0.103	2.62	3.66	AS 568
AS568-124	1.237	31.42	0.103	2.62	3.66	AS 568
AS568-125	1.299	32.99	0.103	2.62	3.66	AS 568
AS568-126	1.362	34.59	0.103	2.62	3.66	AS 568
AS568-127	1.424	36.17	0.103	2.62	3.66	AS 568
AS568-128	1.487	37.77	0.103	2.62	3.66	AS 568
AS568-129	1.549	39.34	0.103	2.62	3.66	AS 568
AS568-130	1.612	40.94	0.103	2.62	3.66	AS 568
AS568-131	1.674	42.52	0.103	2.62	3.66	AS 568
AS568-132	1.737	44.12	0.103	2.62	3.66	AS 568
AS568-133	1.799	45.69	0.103	2.62	3.66	AS 568
AS568-134	1.862	47.29	0.103	2.62	3.66	AS 568
AS568-135	1.924	48.87	0.103	2.62	3.66	AS 568
AS568-136	1.987	50.47	0.103	2.62	3.66	AS 568
AS568-137	2.049	52.04	0.103	2.62	3.66	AS 568
AS568-138	2.112	53.64	0.103	2.62	3.66	AS 568
AS568-139	2.174	55.22	0.103	2.62	3.66	AS 568
AS568-140	2.237	56.82	0.103	2.62	3.66	AS 568

Video: EPDM AS568 O-Rings (Inch Series)

How to Measure an O Ring (with only basic tools)

Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.

Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

01

Cold heading

Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

Head dimensions and under-head radius checked at set-up and per shift.
02

Thread rolling

Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

Go / no-go ring gauges to ISO 965 tolerance class 6g.
03

Heat treatment

Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

Core hardness and tensile tested per lot to ISO 898-1.
04

Surface treatment

Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

Is EPDM prone to hydrogen embrittlement?

Class 10.9 and above can be susceptible to hydrogen embrittlement when electroplated. Specify post-plating baking, or use mechanical-zinc / zinc-flake finishes which avoid the cathodic plating step.

Which finish is best for outdoor AS568 O-Rings (Inch Series)?

For outdoor service in steel, hot-dip galvanizing gives the longest life; zinc-flake (Geomet/Delta-Tone family) gives a thinner film with excellent salt-spray performance; standard zinc plating is the lowest-cost option for general indoor / shielded outdoor use.

What's the service temperature limit for EPDM?

The practical service range is approx. -45 °C to +150 °C.

Can EPDM replace stainless steel structurally?

No — stainless A2/A4 cannot match class 10.9 / 12.9 strength. Stainless is selected for corrosion, not raw strength.

How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.

Why Choose EPDM for AS568 O-Rings (Inch Series)

Mechanical & Physical Properties

Galvanic & Galling Considerations

Comparable Grades

Sizes of AS568 O-Rings (Inch Series) Available in EPDM

Technical Drawing

Request a Quote

Request a Quotation

Dimensions & Specifications (AS 568)

Video: EPDM AS568 O-Rings (Inch Series)

Manufactured in our own plant

Cold heading

Thread rolling

Heat treatment

Surface treatment

Frequently Asked Questions

Related Pages

More AS568 O-Rings (Inch Series) Guides