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12MFS-12MAORB STRAIGHT

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Description & Features

The 12MFS-12MAORB Straight by Brennan Industries Inc is precisely designed for industrial applications requiring adaptability and reliability.

This adapter features a thread size A of 1-3/16-12 and a corresponding drill diameter of 0.609 ensuring secure connections in high-pressure environments.

Additionally with a thread size B of 1-1/16-12 and drill diameter of 0.609 this adapter is tailored for consistent performance under various operational conditions.

The hex size stands at 1.250 allowing for straightforward installation and maintenance. The overall length of 1.918 ensures compatibility with various fitting requirements.

Notably it supports a tube O.D. of 3/4 making it versatile for numerous industrial settings.

Designed under series FS6400-O this adapter meets rigorous standards for durability and efficiency.

Supplier Part Number: FS6400-12-12-O

Specifications

Brand
BRENNAN
a Drill Dimensions
0.609 in
b Drill Dimensions
0.609 in
Connection Size 1
3/4 in
Connection Size 2
3/4 in
Connection Type
Male ORFS, Male SAE ORB
Connection Type 1
Male SAE ORFS
Connection Type 2
Male SAE ORB
Dimension Standards
SAE J1453, SAE J1926
Dimensions
1.918 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
1-1/4
Material
Steel
Material Construction
AISI 12L14/C1045 Steel
Maximum Operating Pressure
6000 psi
Operating Temperature
-40 to 250 deg F
Series
FS6400-O Series
Thread Size
1-3/16-16 x 1-1/16-12
Tube Outside Diameter
3/4 in

Product Questions & Answers (1)

Question by: Lyle S on Feb 10, 2026, 4:22 PM
adapter's got a 1-3/16-12 on one end and 1-1/16-12 on the other, that right? trying to make sure i got the thread sizes straight before i order
Answer by: Customer Support on Feb 11, 2026, 9:19 PM
Correct on both counts. The A-side thread is 1-3/16-12 and the B-side is 1-1/16-12, with a drill diameter of 0.609 on each end. Both ends share that same drill size, so there's no mismatch to worry about there. The hex comes in at 1.250 and the overall length runs 1.918, which should help you confirm fitment before it ships.

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