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16 MJ FLARE-O O-RING, 90 DUROMETER NBR

Description & Features

Designed for metric JIC (MJ) flare connections, this size 16 O-ring provides a reliable face seal at the flare interface in hydraulic tube assemblies. Manufactured from 90 durometer NBR (nitrile rubber), it offers firm compression resistance and strong compatibility with petroleum-based hydraulic fluids, making it well-suited for demanding industrial hydraulic circuits.

The 16 MJ Flare-O O-Ring from Brennan Industries (Series F4003) corresponds to a 1-inch tube OD and features an inner diameter of 0.864 inches. The elevated durometer rating of 90 provides a harder seal compared to standard 70 durometer NBR, supporting applications where higher extrusion resistance is required under pressure. This O-ring is intended for use with male MJ flare fittings and is a Brennan-supplied component.

SKU: F4003-16

Supplier Part Number (MPN): F4003-16

Specifications

Brand BRENNAN	Color Black	Connection Size 1 1 in	Connection Type Flared	Connection Type 1 Flared	Dash Size 20	Dimensions 0.07 in W	Durometer 90	Fitting Type O-ring	Inside Diameter 0.86 in	Material Nitrile	Material Construction Nitrile	Operating Temperature -40 to 250 deg F	Outside Diameter 1 in	Series F4003 Series

Product Questions & Answers (1)

Question by: Roy H on Feb 5, 2026, 1:57 PM

Reckon this'll hold up okay with some heavy-duty hydraulic fluid?

Answer by: Customer Support on Feb 6, 2026, 2:11 PM

NBR (nitrile rubber) offers strong compatibility with petroleum-based hydraulic fluids, so this O-ring should work well in demanding industrial hydraulic circuits.