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#4 X #3 MJIC UNION

Description & Features

This straight steel #4 X #3 MJIC UNION, part of the 2403 series, is designed for hydraulic applications requiring a secure and reliable connection. Featuring male JIC SAE 37-degree flare threads on both ends, this union ensures a tight seal and optimal performance.

The union is constructed from a raw straight steel material, offering durability and strength in demanding environments. With a maximum dynamic pressure rating of 7,500 PSI, it is suitable for high-pressure hydraulic systems. The thread sizes are 7/16-20 and 3/8-24, both adhering to SAE J514 specifications.

SKU: 2403-04-03

Supplier Part Number (MPN): 2403-04-03

Alternate Part Numbers: A2027-4-3S

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 2403-04-03	Product Weight 0.04 lbs

Product Questions & Answers (1)

Question by: Ralph A on Feb 14, 2026, 3:15 PM

what's the pressure rating on this union, and will it hold up on a system running pretty steady around 6,000 PSI?

Answer by: Customer Support on Feb 16, 2026, 10:27 AM

At 7,500 PSI max dynamic pressure, it's got a solid margin above 6,000 PSI for regular hydraulic system use. That rating covers dynamic conditions, so it's not just a static benchmark. For a system running steady in that range, this union should handle it without issue.