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BRENNAN ADAPTER

Description & Features

Designed to reduce line size between two JIC connections, this straight steel adapter transitions from a 9/16-18 Male JIC SAE 37° Flare (Thread B1) to a 7/16-20 Male JIC SAE 37° Flare (Thread B2), with both threads conforming to SAE J514. The Brennan Adapter is rated for dynamic pressures up to 6,000 PSI, making it well-suited for demanding hydraulic circuit applications where a reliable male-to-male JIC fitting is required.

Constructed from straight steel and built to the Brennan Industries 2403-LH series standard, this large hex adapter offers a secure grip for installation and removal. The compact overall length of 1.400 mm keeps the fitting profile tight within confined assemblies. California residents should note that this product is subject to a Proposition 65 warning per Brennan Industries guidelines.

SKU: 2403-LH-06-04

Supplier Part Number (MPN): 2403-LH-06-04

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 2403-LH-06-04	Product Weight 0.09 lbs

Product Questions & Answers (1)

Question by: Brent W on Feb 11, 2026, 1:41 PM

trying to swap a fitting on a line, is this the straight adapter that goes 9/16-18 male JIC down to 7/16-20 male JIC?

Answer by: Customer Support on Feb 12, 2026, 6:33 PM

For a straight JIC flare-to-JIC flare step-down, this part matches that setup. One end is a 9/16-18 male JIC SAE 37 degree flare and the other end is a 7/16-20 male JIC SAE 37 degree flare, both built to SAE J514.