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12MJ-12FJS STRAIGHT

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Description & Features

The 12MJ-12FJS Straight adapter from Brennan Industries Inc is engineered with precision for industrial applications. Designed with a male JIC SAE 37-degree flare and a female JIC swivel 37-degree flare, this adapter conforms to SAE J514 specifications, ensuring reliable and accurate connections.

Manufactured from high-quality straight steel, it features a robust design with a C Hex 1 size of 1.250 mm and an overall length of 2.330 mm. The device supports a thread size of 1-1/16-12 for both male and female configurations. Both thread types boast a drill size of 0.609 mm for optimal performance.

Series: 6504

Supplier Part Number: 6504-12-12

California Residents: PROP-65 WARNING

Specifications

Connection Size 1
3/4 in
Connection Size 2
3/4 in
Connection Type
Female JIC Swivel, Male JIC
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Female SAE 37 deg JIC Flare Swivel
Dimension Standards
SAE J514
Dimensions
2.33 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
1-1/4 x 1-1/8 in
l2 Dimensions
1.77 in
Material
Steel
Material Construction
AISI 12L14/1045 Steel
Maximum Operating Pressure
5000 psi
Series
6504 Series
Thread 2 Drill Dimensions
0.609 in
Thread B1 Drill Dimensions
0.609 in
Thread Size
1-1/16-12

Product Questions & Answers (3)

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Question by: Ralph M on Feb 18, 2026, 8:30 PM
thread size on both ends is 1-1/16-12 on this one, right? just want to make sure before i order a handful of em
Answer by: Customer Support on Feb 20, 2026, 4:09 PM
Both ends run the same 1-1/16-12 thread, so you've got it right. One side is a male JIC 37-degree flare and the other is a female JIC swivel with the same 37-degree flare angle. Both conform to SAE J514, so they'll mate up with standard JIC fittings on either end.
Question by: Travis R on Jan 30, 2026, 9:51 PM
got a hose with a 1-1/16-12 JIC male on it. will this adapter hook that up to a female JIC swivel end?
Answer by: Customer Support on Feb 1, 2026, 9:19 AM
With a male JIC SAE 37 degree flare on one side and a female JIC swivel 37 degree flare on the other, it is meant to mate JIC 37 degree flare connections that share the 1-1/16-12 thread size. Both ends on this adapter are SAE J514 JIC flare style.
Question by: Tommy W on Jun 7, 2025, 9:27 PM
So, this is just a straight adapter, right? No weird angles or anything?
Answer by: Customer Support on Jun 9, 2025, 10:45 AM
That's correct. This 12MJ-12FJS is a straight adapter designed for connecting two JIC SAE 37-degree flare fittings in a straight line.

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