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12FFSS-06MFS STRAIGHT

Description & Features

A straight face seal fitting designed for connecting 3/4" to 3/8" tube OD lines, the 12FFSS-06MFS Straight is part of Brennan Industries' FS2406 series and is supplied as a two-piece assembly. The larger end carries a 1-3/16-12 thread with a 3/4" tube OD interface, while the smaller end features an 11/16-16 thread sized for 3/8" tube OD connections. With an overall length of 1.030" and a 1.375" C hex, this fitting is well-suited for compact hydraulic installations where space and thread compatibility are both considerations.

Face seal (FFSS/MFS) configurations provide reliable, leak-resistant connections in high-pressure hydraulic circuits. This straight fitting accommodates a size reduction between connection points, making it practical for circuits where line sizes transition within a manifold or component assembly.

SKU: FS2406-12-06

Supplier Part Number (MPN): FS2406-12-06

Alternate Part Numbers: AFF2281T0612S, FF2406-12-06

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number FS2406-12-06	Product Weight 0.34 lbs

Product Questions & Answers (3)

Question by: Shawn G on Aug 1, 2025, 8:30 AM

Got a line dropping from 3/4 down to 3/8 tube OD on a manifold block. This a straight reducer fitting or is there some kind of offset to it?

Answer by: Customer Support on Aug 2, 2025, 8:24 PM

Straight through, no offset. The larger end threads in at 1-3/16-12 for the 3/4" tube OD side, and the smaller end runs 11/16-16 for the 3/8" tube OD connection. Both ends use face seal, so you get a clean, leak-resistant joint on each side. At just over an inch long with a 1.375" hex, it fits pretty tight in compact assemblies without a lot of extra clearance needed.

Question by: Warren P on Apr 13, 2025, 6:11 PM

trying to swap a line down from 3/4 tube to 3/8 tube, is that what this straight fitting is for?

Answer by: Customer Support on Apr 14, 2025, 9:06 PM

For stepping down between line sizes, this one goes from a 3/4 inch tube OD end to a 3/8 inch tube OD end in a straight, face seal style. The larger side uses a 1-3/16-12 thread and the smaller side uses an 11/16-16 thread, so it is meant for a size reduction where those thread sizes match up.

Question by: Hubert G on Jul 9, 2025, 8:30 AM

Reckon this'll work to hook up a 3/4" line to a 3/8" one?

Answer by: Customer Support on Jul 10, 2025, 9:28 AM

This straight face seal fitting is indeed designed to connect a 3/4" OD tube to a 3/8" OD tube. That's exactly what the different thread sizes (1-3/16-12 and 11/16-16) are there for.