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ADAPTER

Description & Features

The Adapter by Brennan Industries Inc is a high-quality connector designed for specialized industrial applications. It features an 11/16-16 thread and 7/16-20 thread providing compatibility with various tubing sizes and ensuring precise connections.

With a tube O.D. of 3/8 on one end and 1/4 on the other this adapter ensures optimal fit and function within your configurations. Engineered for durability the hex dimensions are 0.812" and 0.750" respectively ensuring a secure fit during installation and maintenance.

Measuring 1.660" in length the Adapter is a versatile component in the FS6504 series known for its reliable performance in demanding environments.

Supplier Part Number: FS6504-06-04

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number FS6504-06-04	Product Weight 1.00 lbs

Product Questions & Answers (3)

Question by: Lyle H on Nov 16, 2025, 6:00 AM

Got a 3/8 tube on one end and a 1/4 on the other, this the right part to step those down?

Answer by: Customer Support on Nov 17, 2025, 5:56 PM

That's what this one's built for. One end handles 3/8 tube O.D. with an 11/16-16 thread, and the other steps down to 1/4 tube O.D. on a 7/16-20 thread. If those sizes match what you're working with, you've got the right adapter.

Question by: Dwight B on Nov 13, 2025, 2:55 PM

got a line with 3/8 tube on one side and 1/4 on the other, is this the right adapter for that?

Answer by: Customer Support on Nov 15, 2025, 12:04 PM

For stepping between those two tube sizes, this adapter matches 3/8 tube O.D. on one end and 1/4 tube O.D. on the other, with 11/16-16 threads on the 3/8 side and 7/16-20 threads on the 1/4 side.

Question by: Diane J on Feb 23, 2026, 6:34 PM

So, is this thing good for hooking up different sized tubes together?

Answer by: Customer Support on Feb 25, 2026, 6:34 AM

Context-first. Yes, it's designed to connect a 3/8" OD tube to a 1/4" OD tube.