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MJ BLKHD W/NUT

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Description & Features

The MJ BLKHD W/NUT is a straight steel adapter from Brennan Industries Inc. With an overall length of 2.070 mm it is designed for industrial applications requiring reliable connections.

This adapter features male JIC SAE 37-degree flare threads on both ends specifically 7/16-20 size meeting the SAE J514 specification. It includes a lock nut for secure fittings aligning with the 0306-04 locknut specification.

The product from the 2700-LN series also has a C hex dimension of 0.687 mm ensuring compatibility with various hydraulic systems.

Supplier Part Number: 2700-LN-04-04

Meta Title: MJ BLKHD W/NUT 2700-LN-04-04

Specifications

Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Type
Male JIC
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Male SAE 37 deg JIC Flare
Dimension Standards
MS 51520, SAE J514
Dimensions
2.07 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
11/16 in
Material
Steel
Material Construction
AISI 12L14/1045 Steel
Series
2700-LN Series
Thread 2 Drill Dimensions
0.172 in
Thread B1 Drill Dimensions
0.172 in
Thread Size
7/16-20

Product Questions & Answers (2)

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Question by: Carl S on Oct 9, 2025, 3:33 PM
both ends on this fitting are male JIC, so how's it supposed to mount through a panel, does the nut hold it in place from one side?
Answer by: Customer Support on Oct 11, 2025, 11:54 AM
That's exactly how it works. One male end passes through the panel opening, and the included 0306-04 lock nut threads onto that end from the back side, clamping the fitting securely against the panel. The other male JIC end sticks out on the opposite face to accept your hose or tube connection. Both threads are 7/16-20 and conform to SAE J514, so as long as your mating fittings match that spec, you'll get a solid, leak-resistant connection at the bulkhead.
Question by: Glen W on Apr 18, 2025, 7:11 AM
i’ve got a bulkhead spot to go through a panel, is this the straight one with the jam nut?
Answer by: Customer Support on Apr 19, 2025, 8:53 AM
For a panel or bracket pass-through, this is the straight bulkhead-style adapter that comes with a lock nut. It uses male JIC SAE 37 degree flare threads on both ends, and the locknut spec is listed as 0306-04.

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