013 EPDM O-Ring 70A 7/16 in ID 500-Pack - Durable Weather-Resistant

Our review of the 013 EPDM O-Ring pack finds it best suited to maintenance shops, plumbing and HVAC technicians, and anyone stocking routine seals. The bottom line: this pack of 500 black EPDM o-rings delivers consistent, standardized sizing and proven resistance to ozone, sunlight and weather, so it removes a common worry in bulk purchases - whether each ring will meet nominal dimensions and perform in wet or aging environments. For sealing applications that encounter water, brake fluids, or steam exposure in routine service ranges, these o-rings are a practical, cost-effective choice.

Key Features

• Standard AS568 size: The 013 sizing ensures compatibility with common grooves and fittings that accept a 7/16 in ID o-ring for straightforward replacements.
• EPDM compound: The material gives excellent resistance to ozone, sunlight and weathering, extending service life outdoors or in damp environments.
• 70A durometer: A medium hardness that balances flexibility with sealing force, useful for static and some low-dynamic sealing tasks.
• Wide temperature range: Rated from -55C to 125C, the o-rings remain flexible in cold and stable across normal operating heat for many fluid systems.
• Large pack quantity: Supplied as a 500-pack, it offers value for shops and production lines that consume common sizes frequently and want consistent parts on hand.
• Chemical compatibility: Performs well with water, alcohols, dilute acids and alkalis, brake fluids and many polar solvents, expanding its usable applications.

Who It's For

These o-rings are ideal for industrial maintenance teams, plumbers, HVAC technicians and hobbyists who require a reliable, weather-resistant seal in bulk. The pack size and standardized dimensions make it convenient for stocking and repetitive replacements where cost and consistency matter.

Those who need resistance to petroleum oils, strong hydrocarbons, or specialized high-pressure dynamic sealing should look elsewhere; EPDM is not recommended for many nonpolar solvents and certain hydraulic oils outside its listed compatibilities.

Pros & Cons

Pros

• Consistent AS568 013 sizing simplifies replacements in common fittings and grooves.
• EPDM compound provides strong resistance to ozone, sunlight, weathering and aging for outdoor and damp applications.
• 500-piece pack reduces per-unit cost and keeps a ready supply for shops and production use.
• Acceptable performance with water, alcohols, brake fluid and phosphate ester hydraulic fluids increases versatility.

Cons

• EPDM is not suitable for many petroleum-based oils and certain solvents, limiting use in some automotive or oil-heavy applications.
• The nominal and actual cross-section differ slightly, so precise dynamic sealing tolerances may require measurement before use.

Specifications

Material	EPDM
Durometer	70A
Nominal Dimensions	7/16 in ID, 9/16 in OD, 1/16 in CS
Actual Dimensions	0.426 in ID, 0.566 in OD, 0.070 in CS
Metric Dimensions	10.82 mm ID, 14.38 mm OD, 1.78 mm CS
Temperature Range	-55C (-67F) to 125C (257F)
Quantity	Pack of 500

Our Verdict

This 013 EPDM 70A o-ring 500-pack is a pragmatic choice for anyone who needs reliable, weather-resistant seals in bulk. It offers consistent AS568 sizing, versatile chemical tolerance for water and polar fluids, and a useful temperature range, delivering good value for maintenance, plumbing and HVAC use while avoiding applications that require oil-resistant compounds.

Frequently Asked Questions

Are these o-rings suitable for outdoor exposure?
Yes. The EPDM compound resists ozone, sunlight and weathering, making them appropriate for outdoor and damp environments.

Can these be used with automotive oils?
No. EPDM is not recommended for many petroleum-based oils and strong hydrocarbons, so choose a different material for those fluids.

Do the dimensions match standard fittings?
Yes. The rings follow AS568 013 nominal sizing and list both nominal and actual dimensions for accurate selection.