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#3 X #2 MJIC UNION

Description & Features

A straight steel union fitting, the #3 X #2 MJIC Union connects two male JIC SAE 37-degree flare threads of differing dash sizes in a single inline assembly. Thread B1 is sized at 3/8-24 (SAE J514), while Thread B2 measures 5/16-24 (SAE J514), making this a reducing union suited for hydraulic lines where a size transition is required without additional adapters.

Manufactured by Brennan Industries from straight steel construction, this fitting is rated to a maximum dynamic pressure of 7,500 PSI. Both connection ends conform to SAE J514, ensuring compatibility with standard JIC flare fittings commonly used in mobile hydraulic and industrial fluid power systems. California residents should note that this product carries a Proposition 65 warning.

SKU: 2403-03-02

Supplier Part Number (MPN): 2403-03-02

Alternate Part Numbers: C1BF50

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 2403-03-02	Product Weight 0.03 lbs

Product Questions & Answers (1)

Question by: Brett R on Feb 24, 2026, 10:56 AM

Is this the right kinda fitting to join two JIC lines that are different sizes? Like, if I need to go from a bigger line to a smaller one without using a bunch of extra parts?

Answer by: Customer Support on Feb 25, 2026, 6:15 PM

Exactly right. This union is designed to connect two male JIC lines with different dash sizes in a single go, so you can transition between sizes cleanly.