207 Viton O-Ring 75A 9/16in ID 13/16in OD Pack of 100 - Durable Seal

In this review of the 207 Viton O-Ring pack, the bottom line is simple: this set is for anyone who needs reliable, heat- and chemical-resistant seals in bulk. The reviewer found these O-rings especially useful for automotive injector seals and general plumbing or hydraulic repairs where resistance to fuels, oils and high temperature is required. The major reason to buy is the material - brown Viton at 75A durometer - which delivers a consistent seal across a wide temperature range and aggressive fluid exposure.

Key Features

• Material: Viton fluorocarbon elastomer offers high resistance to heat, fuel and many chemicals so the rings last longer in demanding environments.
• Durometer: 75A hardness provides a balanced combination of flexibility and compression set resistance for reliable sealing under load.
• Temperature range: Rated from -26C to 232C, these rings remain functional in very low and very high temperature service.
• Sizes: Nominal 9/16in ID and 13/16in OD with close actual dimensions, making fit predictable for AS568 size installations.
• Bulk pack: Supplied as a pack of 100, convenient for maintenance shops and repeat repairs without frequent reordering.
• Chemical compatibility: Performs well with petroleum fuels, diesel, biodiesel blends, silicone oils, and many hydrocarbons for versatile use.

Who It's For

The 207 Viton O-Ring pack suits automotive technicians, shop mechanics, and DIYers who work with fuel systems, injectors, or fittings that see high temperatures and hydrocarbon exposure. The pack quantity and stable material make it appropriate for preventive maintenance or keeping a parts bin stocked.

Those who need o-rings resistant to strong alkalis, ammonia, or certain low molecular organic acids should look elsewhere, since Viton has known vulnerabilities with those specific chemistries. Also, if an exact color match or a thicker cross-section is critical, verify fit first because some customers noted perceived variance in thickness and color.

Pros & Cons

Pros

• High chemical and heat resistance from the Viton material gives dependable sealing in petroleum and high-temperature applications.
• Pack of 100 is cost-effective for frequent repairs and routine maintenance.
• Actual dimensions closely match nominal sizes, so these typically fit standard AS568 applications without guesswork.
• Customers report good leak prevention and proper fit for common uses like injector seals and garden hose fittings.

Cons

• Some users reported the rings feel thinner than expected, so confirm cross-section suitability for critical seals.
• Viton is not compatible with certain alkalis, ammonia, or some organic acids, limiting use in those chemistries.

Specifications

Material	Viton (fluorocarbon elastomer)
Durometer	75A
Nominal dimensions	9/16in ID, 13/16in OD, 1/8in CS
Actual dimensions	0.546in ID, 0.824in OD, 0.139in CS
Metric dimensions	13.87 mm ID, 20.93 mm OD, 3.53 mm CS
Temperature range	-26C (-15F) to 232C (450F)
Quantity	Pack of 100

Our Verdict

The 207 Viton O-Ring pack is a practical choice for anyone needing reliable seals that resist fuels, oils and high temperatures; its close dimensional tolerances and 75A hardness deliver consistent performance and value for maintenance work. Buy this pack if you need a bulk supply of AS568-compatible Viton rings for automotive, plumbing, or hydraulic use, but test for thickness and chemical compatibility when working with aggressive alkalis or unusual fluids.

Frequently Asked Questions

Are these o-rings the AS568 size standard?
Yes, they are produced to match AS568 nominal sizing and the actual measurements are listed for confirmation.

Will these resist gasoline and diesel exposure?
Yes, Viton is compatible with petroleum fuels, diesel and many hydrocarbon blends, making these suitable for fuel-system seals.

Is the color an indicator of material or quality?
The brown color corresponds to the Viton compound used but does not affect sealing performance; some customers noted color variance yet confirmed proper fit and function.