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08 BUNA O-RING

Description & Features

This 08 Buna O-Ring is designed for MORB/SAE port connections.

Constructed from 90 Durometer NBR (Nitrile Butadiene Rubber), this O-ring ensures a reliable seal. It conforms to NBR specifications, with a tube OD of 1/2 in. and an ID drill size of 0.644 mm.

SKU: 4000-08

Supplier Part Number (MPN): 4000-08

Specifications

Brand BRENNAN	Color Black	Dash Size 08	Dimensions 0.087 in W	Durometer 90	Inside Diameter 0.64 in	Material Nitrile	Series SAE-J1926-ORB-O-ring Series	Suitable For Use With 1/2 in Tube OD ORB

Product Questions & Answers (3)

Question by: Rod H on Dec 23, 2025, 6:45 AM

got a MORB/SAE port with 1/2 tube OD, is this the right o-ring size?

Answer by: Customer Support on Dec 24, 2025, 10:09 AM

For MORB and SAE port connections that call out a 1/2 inch tube OD, this one matches that size callout and is the 08 Buna O-ring in the Brennan 4000 series.

Question by: Cody H on Dec 5, 2025, 4:15 PM

So this is just a rubber o-ring, right? What kind of stuff is it good for?

Answer by: Customer Support on Dec 6, 2025, 4:38 PM

Constructed from 90 Durometer NBR (Nitrile Butadiene Rubber), this O-ring is designed for MORB/SAE port connections requiring a reliable seal.

Question by: Tony M on Jul 10, 2025, 6:19 AM

What size tube connection is this o-ring made for?

Answer by: Customer Support on Jul 12, 2025, 7:12 AM

For 1/2 inch tube OD connections on MORB/SAE ports, this is the right fit. The ID drill size comes in at 0.644 mm, and it's built from 90 durometer NBR, so you're getting a pretty firm, reliable seal where it counts.