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04MFS-04MFS BULKHEAD UNION W/LOCKNUT

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Description & Features

Designed for through-panel or bulkhead mounting, this 1/4 in. tube OD fitting provides a straight, fixed-position connection point in hydraulic lines where routing passes through a panel or structural barrier. The 04MFS-04MFS Bulkhead Union with Locknut from Brennan Industries features identical 9/16-18 male fittings on both ends, with a 0.812 in. hex and an overall assembled length of 1.900 in.

The included locknut (FS0306-04) secures the fitting firmly in place once installed through the mounting surface, preventing rotation or loosening under vibration. Both ports share a 0.172 in. drill size, making this a symmetric, straight-through union suited for consistent line sizing on either side of the bulkhead.

SKU: FS2700-LN-04-04

Supplier Part Number (MPN): FS2700-LN-04-04

Alternate Part Numbers: 1046-2236, AFF1994T0404S, FF2700-LN-04-04

Specifications

Brand
BRENNAN
a1 Drill Dimensions
0.172 in
a2 Drill Dimensions
0.172 in
Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Type
Male ORFS
Connection Type 1
Male SAE ORFS
Connection Type 2
Male SAE ORFS
Dimension Standards
SAE J1453, SAE J515
Dimensions
1.9 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Union
Hex Size
0.81 in
Locknut Assembled
FS0306-04
Material
Steel
Material Construction
AISI 12L14/1045 Steel
Operating Temperature
-40 to 250 deg F
Series
FS2700-LN Series
Thread Size
9/16-18
Tube OD
1/4 in
Tube Outside Diameter
1/4 in

Product Questions & Answers (1)

Question by: Glen K on Oct 3, 2025, 2:14 PM
So this thing just lets me run a line through a panel, right?
Answer by: Customer Support on Oct 5, 2025, 6:21 AM
That's the main idea. It's a bulkhead union designed to let you pass a 1/4" tube OD line through a panel or other barrier, keeping it secure with the included locknut.

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