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12MJ-12MP STRAIGHT BRASS

Description & Features

The 12MJ-12MP Straight Brass adapter from Brennan Industries Inc. is engineered for demanding industrial environments. This high-quality component adheres to stringent specifications including SAE J514 and SAE J476.

The raw material straight brass ensures durability and resistance to corrosion making it ideal for various industrial applications. Featuring a 1-1/16-12 Male JIC SAE 37-degree flare thread and a 3/4-14 Male NPTF thread this adapter guarantees a reliable connection.

Its overall length of 2.060 mm and a cubic inch space of 2.607 deliver compact yet efficient functionality. The precision in thread drill measurements0.609 mm for B1 and 0.719 mm for B2further underscores the meticulous engineering behind this product.

Part Number: 2404-12-12-B

California Residents: PROP-65 WARNING

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 2404-12-12-B	Product Weight 0.30 lbs

Product Questions & Answers (3)

Question by: Cheryl H on Jan 17, 2026, 6:33 PM

Got a JIC line on one end and need to tie into a 3/4 NPT port on the other, this brass straight adapter do that?

Answer by: Customer Support on Jan 19, 2026, 6:38 AM

That's what it's built for. One end is a 1-1/16-12 Male JIC with a 37-degree flare, conforming to SAE J514. The other end is a 3/4-14 Male NPTF thread, covered under SAE J476. So if your line has a mating JIC female fitting and your port takes a 3/4-14 NPTF connection, this adapter bridges those two without any additional fittings in between.

Question by: Rex W on Dec 25, 2025, 9:40 AM

trying to hook a JIC line to a pipe port, is this the right adapter?

Answer by: Customer Support on Dec 26, 2025, 6:42 PM

For that kind of hookup, it bridges a 1-1/16-12 Male JIC SAE 37 degree flare on one end to a 3/4-14 Male NPTF on the other, so it is meant for a JIC flare connection to a female JIC side and a pipe thread connection to a female NPTF side.

Question by: Brent F on Aug 29, 2025, 6:10 PM

Is this the right fitting to hook up a line with a 37-degree flare to a NPTF port?

Answer by: Customer Support on Aug 31, 2025, 10:03 AM

That's right, this adapter has a 1-1/16-12 Male JIC SAE 37-degree flare thread on one side and a 3/4-14 Male NPTF thread on the other, so it'll do what you need.