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08 BUNA O-RING

Description & Features

The 08 Face Seal O-Ring 90 Durometer NBR is designed for optimal performance in demanding industrial settings. Manufactured by Brennan Industries Inc this O-Ring ensures a reliable seal with a 0.489 I.D. and 0.070 width making it suitable for various specialized applications.

With a robust durometer rating of 90 it offers durability and resilience under challenging conditions. Specifically designed for the FS4000 series it fits a tube O.D. of 1/2 providing consistent performance in technical environments.

Its construction from high-quality NBR material commonly known as Buna-N ensures resistance to wear and tear making it an essential component for maintaining system integrity. The precise dimensions and high-quality material contribute to a dependable sealing solution preventing leaks and enhancing the overall efficiency of the system it is integrated into.

Supplier Part Number: FS4000-08

MPN: FS4000-08

Specifications

Color Black	Dash Size 08	Dimensions 0.07 in W	Durometer 90	Inside Diameter 0.36 in	Material Nitrile	Series FS4000 Series	Suitable For Use With 1/2 in Tube OD ORFS

Product Questions & Answers (2)

Question by: Judy D on Dec 12, 2025, 5:52 PM

got a FS4000 setup on a 1/2 tube, is this the right o-ring size for that?

Answer by: Customer Support on Dec 14, 2025, 6:10 AM

For FS4000 series face seal fittings that use a 1/2 inch tube O.D., this is the matching size. It is FS4000-08 with a 0.489 inch I.D. and 0.070 inch width.

Question by: Curt P on Jan 19, 2026, 9:07 AM

Does this o-ring fit a half-inch tube OD, or is the sizing based on something else?

Answer by: Customer Support on Jan 21, 2026, 6:57 AM

Half-inch tube OD is exactly what this one's built for. It's part of the FS4000 face seal series, with a 0.489 inch inner diameter and a 0.070 inch width. Those dimensions are specific to that tube size, so if you're working with 1/2 inch tubing in a face seal fitting setup, it should drop right in without any fuss.