Skip to the beginning of the images gallery

BRENNAN ADAPTER

Description & Features

Designed for hydraulic line connections requiring a male-to-male transition, this straight long adapter from Brennan Industries converts between a 9/16-18 Male JIC SAE 37° Flare (SAE J514) and a 9/16-18 Male SAE O-Ring Boss thread of the same specification. The extended overall length of 10.640 mm accommodates installations where standard-length adapters fall short due to port depth or clearance constraints.

Constructed from straight steel with an NBR O-ring seal, the Brennan Adapter is built for reliable sealing in demanding hydraulic systems. The O-ring boss end provides a positive, leak-resistant seal at the port face, while the JIC flare end delivers dependable mechanical seating. California residents should note this product is subject to a Prop 65 warning.

SKU: 6400-L-06-06-OX10.64

Supplier Part Number (MPN): 6400-L-06-06-OX10.64

Specifications

Connection Size 1 3/8 in	Connection Size 2 3/8 in	Connection Type Male JIC, Male SAE ORB	Connection Type 1 Male SAE 37 deg JIC Flare	Connection Type 2 Male SAE ORB	Dimension Standards SAE J1926, SAE J514	Dimensions 10.64 in L	Finish Zinc Trivalent	Fitting Type Adapter	Hex Size 11/16 in	Material Steel	Material Construction 12L14/C1045 Steel	Seam Material NBR	Series 6400-L-O Series	Thread B1 Drill Dimensions 0.297 in	Thread B2 Drill Dimensions 0.297 in	Thread Size 9/16-18

Product Questions & Answers (1)

Question by: Dean H on Mar 10, 2026, 1:39 PM

Just want to make sure, this adapter will let me hook up a JIC flare to an O-ring boss, right? Both sides are 9/16-18?

Answer by: Customer Support on Mar 11, 2026, 2:58 PM

That's correct. This Brennan adapter is designed to provide a reliable connection between a 9/16-18 Male JIC SAE 37° Flare and a 9/16-18 Male SAE O-Ring Boss.