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08 BUNA O-RING

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number FS4000-08	Product Weight 0.01 lbs

Product Questions & Answers 2

Product Questions & Answers

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

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

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.

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

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

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

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