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#4 MP X #2 FP

Description & Features

Constructed from robust straight steel, the #4 MP X #2 FP is designed for durability and high performance in demanding industrial environments. This straight expander features a male NPTF thread type with a size of 1/4-18, and a female NPTF thread type with a size of 1/8-27, both conforming to the SAE J476 standard. With an overall length of 1.220 mm, it facilitates seamless connections and expansions in hydraulic systems.

Engineered to withstand a maximum dynamic pressure of up to 6,000 psi, this expander is ideal for applications requiring reliable pressure management. Manufactured by Brennan Industries, it is a part of the 5405 series, ensuring compatibility and quality assurance. Its precision threading and high-quality material make it a vital component for maintaining system integrity and performance.

SKU: 5405-04-02

Supplier Part Number (MPN): 5405-04-02

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 5405-04-02	Product Weight 0.07 lbs

Product Questions & Answers (2)

Question by: Denise K on Nov 30, 2025, 11:00 AM

need to step a line down, is this the straight fitting that goes 1/4-18 male NPTF into 1/8-27 female NPTF?

Answer by: Customer Support on Dec 2, 2025, 8:47 AM

For a straight NPTF expander setup, it matches that thread step. One side is male NPTF 1/4-18 and the other side is female NPTF 1/8-27, both built to the SAE J476 thread spec.

Question by: Curt H on Feb 25, 2026, 9:18 AM

What's the pressure rating on this fitting, and is it gonna hold up runnin hydraulic lines that see some pretty serious load cycles?

Answer by: Customer Support on Feb 27, 2026, 6:12 AM

Six thousand psi max dynamic pressure is what this expander is rated for, which puts it well within range for most heavy-duty hydraulic work. The straight steel construction handles repeated pressure cycles without giving up much over time, so if your system stays under that threshold you should be in good shape for continuous line use.