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-16 FS BUNA-N 90 BLACK O-RING

Description & Features

Designed for face seal fittings, this 90 durometer Buna-N (NBR) o-ring provides a reliable static seal in hydraulic fluid line connections. With an inner diameter of 0.926 inches and a cross-section width of 0.070 inches, the -16 FS Buna-N 90 Black O-Ring is sized for use with 1-inch OD tubing in the Brennan FS4000 series.

The 90 durometer hardness rating makes this o-ring well suited for higher-pressure face seal applications where resistance to compression set and extrusion is important. Buna-N material offers broad compatibility with petroleum-based hydraulic fluids and is a common choice across mobile and industrial hydraulic systems.

SKU: FS4000-16

Supplier Part Number (MPN): FS4000-16

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number FS4000-16	Product Weight 0.99 lbs

Product Questions & Answers (2)

Question by: Norm M on Jul 30, 2025, 10:12 AM

got a Brennan FS4000 face seal fitting for 1 inch tube, is this the right o-ring size for it?

Answer by: Customer Support on Aug 1, 2025, 7:08 AM

For the FS4000 series face seal setup that uses 1 inch OD tubing, this is the matching -16 face seal o-ring. It has a 0.926 inch inner diameter and a 0.070 inch cross-section, which is the sizing called out for that application.

Question by: Jerry G on Aug 30, 2025, 4:12 PM

I'm swapping out an o-ring on a hydraulic line, and this looks like the right size. This one is for a face seal fitting, right?

Answer by: Customer Support on Sep 1, 2025, 6:54 AM

Yes, this -16 FS Buna-N 90 black o-ring is designed specifically for face seal fittings, so it should work for your hydraulic line connection if it's a face seal type. It fits 1-inch OD tubing in the Brennan FS4000 series.