M1.5x16 Viton O-Ring 75A, 16mm ID 19mm OD (Pack of 100)

In this review the M1.5x16 Viton O-Ring is judged as a practical, high-value option for technicians and hobbyists who need reliable seals in chemical, fuel, or high-temperature environments. The single biggest reason to buy is its material: made from black Viton fluorocarbon elastomer with a 75A durometer, these O-rings offer broad chemical and heat resistance that handles demanding sealing tasks while costing much less per unit than custom parts. For anyone replacing worn seals or stocking a maintenance kit, this pack of 100 offers consistent size and performance.

Key Features

• Material: Viton construction provides resistance to fuels, oils, and many chemicals for longer service life in aggressive environments.
• Hardness: The 75A durometer balances flexibility and compression resistance for dependable sealing under static and some dynamic conditions.
• Temperature range: Rated for a wide range of service temperatures to maintain sealing from very low to high operating heat.
• Size consistency: 16 mm ID and 19 mm OD with a 1.5 mm cross-section ensure repeatable fit for compatible threaded barrels and fittings.
• Pack quantity: Supplied in a pack of 100 for bulk replacements, maintenance supplies, or projects needing multiple seals.

Who It's For

The product is best for mechanics, technicians, and DIYers who work with non-flammable hydraulic fuels, silicone oils, and many aromatic and aliphatic hydrocarbons and need a reliable, consistently sized seal. It is also suitable for those who maintain firearms with threaded parts or motorcycle carburetor seats where customers reported good fit and sealing.

Those who should look elsewhere include users requiring compatibility with ammonia gas, strong alkalis, glycol-based brake fluids, or super-heated steam, since Viton is vulnerable to those media. If a softer or much firmer durometer is required, select a different hardness rating.

Pros & Cons

Pros

• Excellent chemical and fuel resistance for many industrial and automotive fluids.
• Good temperature tolerance that supports applications across a broad heat range.
• Bulk pack of 100 provides strong value and convenience for maintenance kits.
• Customers report reliable fit and seal quality on compatible threaded barrels and carburetor seats.

Cons

• Not compatible with ammonia gas, strong alkalis, some amines, and glycol-based brake fluids.
• The 75A hardness may be too firm for very low-pressure sealing where a softer compound is preferred.

Specifications

Our Verdict

The M1.5x16 Viton O-Ring is a sensible, cost-effective choice for anyone who needs durable seals that resist fuels, oils, and many chemicals while withstanding high temperatures. It is especially good for maintenance shops and hobbyists stocking commonly used sizes, but avoid it where compatibility with ammonia, strong alkalis, or glycol-based fluids is required.

Frequently Asked Questions

Are these O-rings suitable for fuel systems?
Yes, Viton is compatible with many fuels and non-flammable hydraulic fuels, making these O-rings appropriate for many fuel system seals.

Will they fit threaded barrels like Springfield models?
Customers report a good fit on Springfield echelon and some 10mm auto threaded barrels, but confirm exact dimensions against your part before installation.

What environments should be avoided?
Avoid exposure to ammonia gas, strong alkalis, amines, glycol-based brake fluids, and super-heated steam where Viton degradation can occur.