12MP-06MP HEX NIPPLE

Description & Features

Manufactured from straight steel, this reducing hex nipple connects a 3/4-14 Male NPTF thread on one end to a 3/8-18 Male NPTF thread on the other, making it well suited for hydraulic lines and fluid systems where two different pipe thread sizes must be joined inline. Both threads conform to SAE J476, ensuring reliable sealing compatibility with standard NPTF fittings. The 12MP-06MP Hex Nipple is rated to a maximum dynamic pressure of 5,500 PSI, supporting demanding hydraulic service requirements.

At 1.770 inches in overall length, the compact profile fits where space is limited without sacrificing thread engagement or integrity. The hex body allows for secure wrench installation and removal. Part of Brennan Industries' Series 5404, this fitting carries a Proposition 65 warning for California residents.

SKU: 5404-12-06

Supplier Part Number (MPN): 5404-12-06

Alternate Part Numbers: A2083-12-6S, C1HJ51

Specifications

Brand
BRENNAN
Connection Size 1
3/4 in
Connection Size 2
3/8 in
Connection Type
MNPT
Connection Type 1
Male SAE 30 deg NPTF
Connection Type 2
Male SAE 30 deg NPTF
Dimension Standards
SAE J476, SAE J514
Dimensions
1.77 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Nipple
Hex Size
1-1/8 in
Material
Steel
Material Construction
12L14/C1045 Steel
Maximum Operating Pressure
5500 psi
Series
5404 Series
Thread 2 Drill Dimensions
0.406 in
Thread B1 Drill Dimensions
0.719 in
Thread Size
3/4-14 x 3/8-18

Product Questions & Answers (1)

Question by: Hank H on Oct 7, 2025, 6:28 PM
Is this here fitting gonna hold up to some pressure in my hydraulic system? I'm pushing close to the limit sometimes.
Answer by: Customer Support on Oct 9, 2025, 6:28 AM
This hex nipple is rated for dynamic pressures up to 5,500 PSI, so it should handle demanding hydraulic applications without issue.

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