217 O-Ring Viton 75A 1-3/16in ID 1-7/16in OD (Pack of 50)

In this review the 217 O-Ring made from Viton is evaluated for technicians, hobbyists, and maintenance teams who need reliable seals exposed to heat, fuels, and chemicals. The bottom line: this pack of 50 O-rings delivers dependable sealing performance where chemical and high-temperature resistance matter most. The reviewer found the 75A durometer provides a firm but compliant seal for cylindrical overlaps, and that compatibility with common fuels and aromatic hydrocarbons makes these O-rings a sensible replacement for fuel bottle seals and firearm barrel applications.

Key Features

• Material: Viton fluorocarbon elastomer provides excellent resistance to heat, fuels, and many chemicals for longer service life.
• Hardness: The 75A durometer balances flexibility and firmness to maintain a consistent seal without extruding under pressure.
• Temperature range: Usable from -15 degrees F to 450 degrees F, giving broad applicability from cold environments to engine-adjacent heat.
• Cross-section: Round profile forms a reliable seal between overlapping cylindrical surfaces commonly found in fuel systems and small hydraulic fittings.
• Standards: Sized to meet the AS568A 217 standard, ensuring interchangeability with other 217-size parts.
• Chemical compatibility: Works with non-flammable hydraulic fuels, silicone oil, trichloroethylene, benzene, propane and similar media for versatile use.

Who It's For

This O-ring pack is ideal for mechanics, field techs, armorer shops, and DIYers who replace seals on MSA-style fuel bottles, Remington parts, or small equipment where heat and fuel contact are expected. The pack of 50 also suits shops that perform frequent maintenance and need a consistent, in-stock replacement size.

Those who need compatibility with strong alkalis, amines, glycol-based brake fluids, or super-heated steam should look elsewhere, as Viton can be vulnerable to those media. If a softer or much firmer compound is required for specialty vacuum or cryogenic seals, a different elastomer may be preferable.

Pros & Cons

Pros

• Good chemical and fuel resistance makes these O-rings practical for fuel and aromatic hydrocarbon exposure.
• High temperature capability up to 450 degrees F supports use near engines or hot assemblies.
• Customers report reliable fit and leak resistance in common replacement roles, confirming consistent sizing and quality.
• Pack of 50 offers value for workshops and repeat maintenance tasks.

Cons

• Not suitable for contact with low molecular organic acids, ammonia gas, alkalis, or glycol-based brake fluids.
• 75A hardness may be too firm for sealing applications that require a very soft lip-style compression.

Specifications

Our Verdict

The 217 Viton 75A O-ring pack is a practical, cost-effective choice for anyone needing durable seals exposed to fuels, heat, and common hydrocarbons. It is particularly good for routine replacement work and small equipment maintenance where consistent size and chemical resistance are required, making it solid value for workshops and field techs.

Frequently Asked Questions

Are these O-rings compatible with gasoline and diesel?
Yes, Viton is compatible with many fuels and aromatic hydrocarbons, making these O-rings suitable for gasoline and diesel exposure.

Will they hold up near engine temperatures?
Yes, the specified range to 450 degrees F means they tolerate engine-adjacent heat in many applications, though continuous contact at the upper limit should be assessed case by case.

Do these O-rings fit standard 217 applications?
Yes, they are sized to the AS568A 217 dimensions and are reported by customers to fit common 217-size replacements and seals.