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#4 MJ X #4 FP (RIGID) BULKHEAD W LNUT

Description & Features

Designed for bulkhead installations requiring a secure, rigid through-panel connection, the #4 MJ x #4 FP (Rigid) Bulkhead W Lnut from Brennan Industries joins a Male JIC SAE 37-Degree Flare end to a Female NPTF port in a single straight steel fitting. The male end threads to 7/16-20 per SAE J514, while the female NPTF port measures 1/4-18 and conforms to SAE J476, making this fitting compatible with standard hydraulic and fluid power assemblies that combine JIC and NPTF connections at a panel or bulkhead surface.

A lock nut (Brennan 0306-04) is included to secure the fitting through the panel from the opposite side, eliminating movement and maintaining alignment under system pressure or vibration. Overall length is 2.080 inches, with a hex dimension of 0.687 inches. Raw material is straight steel, suited for the demanding conditions typical of hydraulic lines and industrial fluid systems.

SKU: 2705-LN-04-04

Supplier Part Number (MPN): 2705-LN-04-04

Alternate Part Numbers: A2239-4-4S

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 2705-LN-04-04	Product Weight 0.14 lbs

Product Questions & Answers (1)

Question by: Lynn R on Sep 3, 2025, 9:48 AM

If I'm hooking this up through a panel, how thick can that panel be?

Answer by: Customer Support on Sep 5, 2025, 6:29 AM

This bulkhead fitting is designed for installations needing a secure through-panel connection, and it comes with a lock nut (Brennan 0306-04) to hold it tight against vibration and pressure. You'll want to account for the 2.080 inch overall length to make sure everything fits right.