462 Viton O-Ring 75A Durometer 16-1/2in ID 17in OD - Durable Seal

In this review the 462 Viton O-ring is evaluated as a single-piece replacement seal for applications that demand chemical and heat resistance. It is best for technicians, hobbyists, and equipment maintainers who need a reliable, heat-tolerant o-ring for fuel, hydraulic or vacuum use; the single biggest reason to buy is the material: made from Viton fluorocarbon elastomer, this o-ring tolerates high temperatures and a wide range of fuels and hydrocarbons while delivering a consistent round seal between overlapping cylindrical surfaces.

Key Features

• Viton material: Provides strong resistance to fuels, aromatic and aliphatic hydrocarbons, ozone and weathering for longer service life in harsh environments.
• Wide temperature range: Rated for use from -15 degrees F to 400 degrees F, allowing use in both cold starts and high-heat systems without rapid degradation.
• 75A durometer: A medium-hard shore hardness that resists penetration and maintains a reliable seal under compression.
• Round cross-section: Designed to seal between cylindrical overlapping surfaces, giving predictable leak resistance when sized correctly.
• AS568A compatibility: Meets the dimensional standards defined by Aerospace Standard AS568A, simplifying selection for common replacement needs.

Who It's For

This o-ring suits mechanics working on non-flammable hydraulic systems, maintenance staff replacing seals in fuel-handling equipment, and owners of specialized gear like MSA fuel bottles or silencers that require a tight, heat-resistant seal. Customers who prioritize chemical compatibility and temperature tolerance will find the material advantages compelling.

It is not ideal for applications exposed to low molecular organic acids, ammonia gas, strong alkalis or glycol-based brake fluids, where Viton is vulnerable; users with those exposures should select a more chemically compatible elastomer. Also, those needing very soft, low-durometer seals for delicate compression should consider a softer compound.

Pros & Cons

Pros

• Excellent heat and fuel resistance that holds up in high-temperature service.
• Precise sizing and round cross-section give reliable leak resistance in cylindrical seals.
• Durable 75A hardness balances resilience with resistance to penetration over time.

Cons

• Not compatible with certain chemicals such as ammonia gas, strong alkalis, amines or glycol-based brake fluids.
• Single pack quantity may require purchasing multiple units for larger projects.

Specifications

Material	Viton (fluorocarbon elastomer)
Color	Black
Inner Diameter (ID)	16-1/2 in
Outer Diameter (OD)	17 in
Cross-section width	1/4 in
Durometer (Shore)	75A
Temperature range	-15 degrees F to 400 degrees F

Our Verdict

The 462 Viton O-ring is a solid choice for anyone needing a heat and fuel resistant replacement seal in hydraulic, fuel, vacuum or weather-exposed systems; its 75A hardness and AS568A dimensional compatibility make it good value for maintenance and repair tasks where chemical resistance and temperature tolerance matter most.

Frequently Asked Questions

Is this o-ring suitable for gasoline and most fuels?
Yes, Viton is compatible with many fuels, aromatic and aliphatic hydrocarbons, and is commonly used where fuel resistance is required.

What temperatures can this o-ring withstand?
This o-ring is usable from -15 degrees F up to 400 degrees F, making it suitable for a wide range of thermal conditions.

Will it work with brake fluid or ammonia?
No, Viton is vulnerable to glycol-based brake fluids, ammonia gas and some alkalis, so choose a different compound for those exposures.