019 EPDM O-Ring 70A 13/16in ID 15/16in OD Pack of 1000 - Durable Seal

In this review the 019 EPDM O-Ring is presented as a no-nonsense supply for technicians and hobbyists who need consistent sealing performance in bulk. The bottom line: this pack of 1000 black, 70A durometer EPDM o-rings delivers predictable dimensions and broad chemical and weather resistance, making it a practical choice for maintenance shops, HVAC work, and prototyping where large quantities and reliability matter. The reviewer found the o-rings true to their listed tolerances and well suited to applications that demand ozone and steam resistance.

Key Features

• Material: EPDM construction offers strong resistance to ozone, sunlight and weather, which reduces unexpected failures outdoors.
• Durometer: 70A hardness provides a balance of flexibility and compression resistance for general sealing tasks across static and some low-dynamic applications.
• Bulk pack: Pack of 1000 supplies a workshop or production run affordably and avoids frequent reordering for common sizes.
• Temperature range: Rated from -55C to 125C so the o-rings work in many cold-weather and high-heat environments up to typical automotive and HVAC service conditions.
• Chemical compatibility: Performs well with alcohols, brake fluid, dilute acids and alkalis, silicone oils and greases, and water, making it versatile for maintenance and repair.
• Standards: Sized to the 019 AS568 equivalent, giving predictable fit for housings and grooves designed to that standard.

Who It's For

These o-rings are best for maintenance technicians, facilities staff, HVAC and plumbing professionals, and makers who use standard AS568 sizes frequently and need large quantities on hand. The 70A EPDM compound is particularly suited to outdoor seals, water systems, steam service up to 204.4C for short exposure, and systems exposed to ozone or sunlight.

Those who need resistance to strong hydrocarbons, petroleum oils, or continuous high-temperature sealing above the listed range should look at other elastomers. Also, applications requiring very tight dynamic sealing at high RPMs may want a different durometer or compound tailored for friction and wear.

Pros & Cons

Pros

• Consistent nominal and actual dimensions make installation predictable for AS568-019 housings.
• Good weathering and ozone resistance extends service life in outdoor and exposed environments.
• Wide chemical compatibility covers many common fluids encountered in maintenance work.
• Bulk 1000-pack reduces per-piece cost for shops and projects that use this size often.

Cons

• EPDM is not suitable for continuous contact with most oils and fuels, so it is not a universal compound for all seal needs.
• 70A hardness may be firmer than desired for some very low-pressure, ultra-soft-seal applications.

Specifications

Material	EPDM
Durometer	70A
Nominal dimensions	13/16in ID, 15/16in OD, 1/16in CS
Actual dimensions	0.801in ID, 0.941in OD, 0.070in CS
Metric dimensions	20.35 mm ID, 23.91 mm OD, 1.78 mm CS
Temperature range	-55C to 125C (-67F to 257F)
Pack quantity	1000 pieces

Our Verdict

The 019 EPDM o-ring in a 1000-piece pack is a practical, cost-effective choice for shops and professionals who need reliable, weather-resistant seals in a standard AS568 size. It is particularly valuable where ozone, sunlight and water resistance matter, and the bulk pack offers good value for frequent use. For oil-heavy or extreme high-temperature continuous service, select a different compound.

Frequently Asked Questions

Are these o-rings compatible with brake fluid?
Yes, EPDM is compatible with many automotive brake fluids and is listed as performing well with brake fluid in the product information.

Do the o-rings match AS568 size 019 exactly?
They are offered to meet the AS568 019 size standard with the listed nominal and actual dimensions for predictable fit in standard grooves.

Can these be used in steam applications?
EPDM tolerates steam exposure and is noted for service up to 204.4C (400F) for short exposures, but assess duration and pressure for your specific steam application.