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#16 X #12 MJIC UNION

Description & Features

The 16MJ-12MJ Straight connector from Brennan Industries Inc. is designed for secure and reliable connections in high-pressure environments. This straight steel union belongs to the 2403 series and features a maximum dynamic pressure capacity of 4 000 psi.

It has a compact design with an overall length of 2.200 mm making it suitable for tight spaces without sacrificing performance. The male JIC SAE 37-degree flare threads conforming to SAE J514 specifications provide a robust connection with thread size B1 of 1-5/16-12 and thread size B2 of 1-1/16-12.

Both ends of the union are drilled to precise dimensions with thread drill B1 at 0.844 mm and thread drill B2 at 0.609 mm. This ensures a consistent fit and optimal performance.

California Residents: PROP-65 WARNING

MPN: 2403-16-12

Supplier Part Number: 2403-16-12

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 2403-16-12	Product Weight 0.41 lbs

Product Questions & Answers (3)

Question by: Harvey H on Oct 31, 2025, 11:11 AM

Will this union handle 4000 psi okay?

Answer by: Customer Support on Nov 2, 2025, 9:01 AM

It's designed to handle a maximum dynamic pressure of 4,000 psi, according to the specs. So you should be good to go.

Question by: Roger H on Jan 15, 2026, 1:11 PM

trying to step down from a #16 JIC to a #12 JIC, is that what this union does?

Answer by: Customer Support on Jan 16, 2026, 8:19 PM

Function-wise, it is a straight steel union with a male JIC 37 degree flare on both ends, sized #16 on one side and #12 on the other. The thread sizes are 1-5/16-12 (B1) and 1-1/16-12 (B2), both to SAE J514.

Question by: Cindy T on May 16, 2025, 5:58 PM

Got a #16 hose end on one side and a #12 on the other, this union gonna work for that kind of reducer setup?

Answer by: Customer Support on May 18, 2025, 6:06 AM

Both ends of this union are male JIC, so it won't work as a reducer between mismatched hose ends. One side is 1-5/16-12 thread and the other is 1-1/16-12 thread, but both are male JIC SAE 37-degree flare fittings. You'd need a female JIC fitting on whatever you're connecting to on each end. If your hose ends are already female JIC, then yes, this bridges a #16 port to a #12 port in a straight inline run just fine.