M3x62 Viton Fluoroelastomer O-Ring 62mm ID Pack of 8 - High Temp Seal

In this review the M3x62 Viton fluoroelastomer O-ring pack is evaluated for workshop and maintenance use where chemical and temperature resistance matter most. The bottom line: this pack of eight 62 millimeter ID O-rings is best for technicians and hobbyists who need a compact, reliable sealing solution that resists fuels, oils and high heat. The reviewer found the O-rings strong, dimensionally consistent, and well suited to applications like power steering caps and small hydraulic fittings where a precise round cross-section and a 75A durometer hardness deliver dependable sealing.

Key Features

• Material: Viton fluoroelastomer gives broad chemical and fuel resistance for applications that encounter oils, aromatic and aliphatic hydrocarbons.
• Temperature range: Usable from about -15 degrees F to 400 degrees F, making these O-rings suitable for both cold-start conditions and high-heat engine compartments.
• Hardness: The 75A Shore durometer provides a balance of compressive sealing and resistance to penetration for static and low-movement joints.
• Size and fit: A 62 mm inside diameter with a 3 mm cross-section offers a consistent round seal for overlapping cylindrical surfaces such as caps and small housings.
• Standards: Manufactured to the Aerospace sizing standard referenced in the product description, which helps when replacing metric O-rings to known dimensions.

Who It's For

This pack is aimed at mechanics, HVAC and hydraulic technicians, and DIYers who repair small engines, pumps, and fluid fittings and need a resilient, heat-capable seal. It is particularly useful when compatibility with fuels, silicone oils, and many hydrocarbons is required.

Those who should look elsewhere include users who need compatibility with strong bases, ammonia, or glycol-based brake fluids, since Viton can be vulnerable to those chemicals. Also choose a different durometer or material if a much softer or highly dynamic seal is required.

Pros & Cons

Pros

• Reliable chemical and fuel resistance makes these O-rings versatile for many service fluids.
• Good temperature tolerance allows use in both cold and high-heat environments without rapid degradation.
• Customers report precise fit and strong durability in common replacements such as steering caps and bottle washers.

Cons

• Not recommended for exposure to strong alkalis, ammonia, or glycol-based brake fluids where material compatibility is poor.

Specifications

Material	Viton (fluorocarbon elastomer)
Durometer	75A Shore
Cross-section	Round, 3 mm width
Inner Diameter (ID)	62 millimeters
Outer Diameter (OD)	68 millimeters
Temperature Range	-15 degrees F / -26 degrees C to 400 degrees F / 205 degrees C
Quantity	Pack of 8

Our Verdict

The M3x62 Viton O-ring pack is a practical choice for anyone needing a compact, heat-resistant seal with good chemical compatibility for fuels and oils. It offers solid value as a set of eight consistently sized rings, ideal for maintenance shops and home mechanics who replace seals on small caps and hydraulic fittings, provided the service fluid is compatible with Viton.

Frequently Asked Questions

Are these O-rings suitable for fuel systems?
Yes, Viton is compatible with many fuels and aromatic and aliphatic hydrocarbons, making these rings suitable for many fuel system sealing tasks.

Will they withstand engine compartment temperatures?
Yes, the rated temperature range up to 400 degrees F supports use in many engine and high-heat environments.

Can they be used with brake fluid?
No, Viton is not recommended for prolonged exposure to glycol-based brake fluids; choose a compatible elastomer for that application.