M2x8 Viton O-Ring 75A Durometer, 8mm ID - Pack of 500

In this review the M2x8 Viton O-Ring is evaluated for mechanics, technicians, and hobbyists who need reliable seals in chemical, fuel, and high-temperature environments. The bottom line: this pack of 500 metric O-rings delivers consistent seal quality and value for volume users who require heat and fuel resistance without frequent reordering. The review focuses on fit, material performance, temperature tolerance, and common applications where a 75A durometer Viton ring is a practical choice.

Key Features

• Material: Made from Viton fluorocarbon elastomer to resist fuels, oils, and many chemicals for longer service life.
• Hardness: The 75A durometer balances flexibility and resilience, providing reliable compression and recovery in dynamic and static seals.
• Temperature range: Useful across a wide operating range so it can handle cold start conditions as well as sustained heat exposure in many systems.
• Dimensions: The 8 mm inner diameter and 12 mm outer diameter give a predictable cross-section that fits common metric shafts and threaded barrels.
• Quantity pack: Supplied as a pack of 500 which reduces downtime and buying frequency for workshops and maintenance teams.

Who It's For

This O-ring pack is best for industrial maintenance crews, automotive and motorcycle mechanics, and hobbyists who perform frequent repairs and need a bulk supply of a reliable, heat-resistant seal. It suits users who work with non-flammable hydraulic fuels, silicone oils, and many hydrocarbons and need consistent, repeatable performance.

Those who should look elsewhere include users needing compatibility with strong alkalis, ammonia gas, or glycol-based brake fluids, and anyone requiring a softer or much harder durometer than 75A for specialized sealing tasks.

Pros & Cons

Pros

• Durable Viton construction offers strong resistance to fuels and many chemicals, improving longevity versus generic elastomers.
• 75A hardness provides a good balance of flexibility and compression set resistance for common static and light dynamic seals.
• Bulk pack of 500 is cost-effective and convenient for frequent use or parts bins.
• Customers report reliable fit and usefulness for threaded barrel protection and various carburetor and sealing jobs.

Cons

• Not compatible with certain media such as low molecular organic acids, strong amines, and some glycol-based fluids, limiting applications.
• Viton can be rigid compared with softer elastomers for delicate low-pressure sealing where very low compression force is needed.

Specifications

Material	Viton (fluorocarbon elastomer)
Durometer	75A
Cross-section	Round
Inner Diameter (ID)	8 mm
Outer Diameter (OD)	12 mm
Width	2 mm
Temperature Range	-15 F (-26 C) to 450 F (232 C)

Our Verdict

The M2x8 Viton O-Ring pack is a solid choice for professionals and DIYers who need a bulk supply of heat- and fuel-resistant seals. Its 75A hardness and Viton composition provide dependable sealing for many industrial and automotive tasks, and the pack of 500 represents good value for routine maintenance and frequent repairs.

Frequently Asked Questions

Are these O-rings compatible with fuel and hydraulic fluids?
Yes, the Viton material is resistant to many fuels and non-flammable hydraulic fluids, aromatic and aliphatic hydrocarbons, and silicone oils.

What temperature range will these O-rings tolerate?
They are rated for use from about -15 F (-26 C) up to 450 F (232 C), making them suitable for a wide range of applications.

Will these work for threaded barrel thread protection?
Customers report they work well to keep thread protectors in place and fit common 10 mm auto Springfield threaded barrels and similar parts.