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BRENNAN ADAPTER

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Description & Features

This Brennan Adapter features a 1-1/2-11-1/2 Brennan A2 Nptf thread and a 1-7/8-12 Brennan B1 thread. The adapter's B1 drill size is 1.344, with a K depth of 0.485 and an L length of 2.230.

Part of the C2405 series, this straight adapter has a 1-1/2 inch tube OD and a C Hex size of 2.375.

SKU: C2405-24-24

Supplier Part Number (MPN): C2405-24-24

Specifications

Brand
BRENNAN
b1 Drill Dimensions
1.344 in
Connection Size 1
1-1/2 in
Connection Size 2
1-1/2 in
Connection Type
Bite, FNPT
Connection Type 1
SAE Flareless Bite
Connection Type 2
Female SAE NPTF
Dimension Standards
SAE J514, SAE J476
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
2.38 in
Material
Steel
Material Construction
12L14/C1045 Steel
Maximum Operating Pressure
2500 psi
Series
C2405 Series
Thread Size
1-7/8-12, 1-1/2-11-1/2

Product Questions & Answers (2)

Question by: Jerry B on Jan 1, 2026, 5:45 PM
What size tubing and pipe thread does this Brennan adapter connect?
Answer by: Customer Support on Jan 3, 2026, 6:52 AM
On one end you've got a 1-1/2 inch tube OD with a 1-7/8-12 thread, and the other end is a 1-1/2-11-1/2 NPTF pipe thread. So it's bridging a straight-thread tube fitting side to a tapered pipe thread side, which is a pretty common need when you're tying hydraulic lines into ported equipment or manifolds.
Question by: Randy E on Feb 1, 2026, 7:07 PM
So this is a straight adapter, right? Just wanna make sure I'm picturing it right before I order.
Answer by: Customer Support on Feb 3, 2026, 6:46 AM
That's correct, this Brennan adapter is a straight configuration, connecting in a direct line.

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