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06FFS-04MFS STRAIGHT

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Description & Features

Experience precision with the 06FFS-04MFS Straight. Designed by Brennan Industries Inc. this adapter ensures reliable performance in industrial applications.

Featuring an 11/16-16 A1 thread and a 3/8 A1 tube O.D. this adapter provides exceptional compatibility. The A2 thread is 9/16-18 with an A2 tube O.D. of 1/4 making it a versatile choice for various setups. The C Hex measures 0.812 inches contributing to its robust design.

With a length of 0.770 inches this adapter fits seamlessly into compact spaces. The 0.172 A2 drill size ensures precision and accuracy.

The 06FFS-04MFS Straight is part of the FS2406 series recognized for its durability and engineering excellence.

Supplier Part Number: FS2406-06-04

Specifications

Brand
BRENNAN
a2 Drill Dimensions
0.172 in
Connection Size 1
3/8 in
Connection Size 2
1/4 in
Connection Type
Female ORFS Swivel, Male ORFS
Connection Type 1
Female SAE ORFS Swivel
Connection Type 2
Male SAE ORFS
Dimension Standards
SAE J1453, SAE J515
Dimensions
1.09 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Reducer
Hex Size
0.81 in
Material
Steel
Material Construction
AISI 12L14/1045 Steel
Operating Temperature
-40 to 250 deg F
Series
FS2406 Series
Thread Size
11/16-16, 9/16-18
Tube OD
1/4 in
Tube Outside Diameter
1/4 in

Product Questions & Answers (1)

Question by: Eddie C on Dec 17, 2025, 9:37 AM
got a line running 3/8 tube on one end and 1/4 on the other, this the right fitting to make that transition straight through?
Answer by: Customer Support on Dec 18, 2025, 9:59 PM
For a straight adapter connecting 3/8 O.D. tube on one side to 1/4 O.D. tube on the other, yes, that's exactly what this fitting does. The A1 side is spec'd for 3/8 tube with an 11/16-16 thread, and the A2 side handles 1/4 tube on a 9/16-18 thread. Both ends use A1-style fittings, so as long as your existing connections match those thread specs, this should drop right in.

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