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04MP-06FP STRAIGHT EXPANDER

Description & Features

The 04MP-06FP Straight Expander is designed for industrial applications requiring high-pressure fittings. Manufactured by Brennan Industries Inc, this component is part of the 5405 series, and is crafted from durable straight steel to ensure long-lasting performance. The fitting supports maximum dynamic pressure up to 6,000 psi, making it suitable for demanding environments.

Featuring a male NPTF thread of 1/4-18 as per SAE J476 standards, and a female NPTF thread of 3/8-18, this expander offers precise connections. The 04MP-06FP Straight Expander ensures reliability and robustness by adhering to strict specifications, making it an essential component in various industrial setups.

With an overall length of 1.440 mm, this expander is engineered to provide optimal functionality. The detailed machining of both Thread B1 and Thread B2 guarantees a secure and seamless fit, maintaining the integrity of your system.

MPN: 5405-04-06

Supplier Part Number: 5405-04-06

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 5405-04-06	Product Weight 0.13 lbs

Product Questions & Answers (2)

Question by: Dwayne P on Dec 20, 2025, 3:55 PM

What's the highest pressure this fitting can handle? Don't want it blowing apart on me.

Answer by: Customer Support on Dec 22, 2025, 9:15 AM

It's rated for a maximum dynamic pressure of 6,000 psi, so it should hold up well in demanding industrial applications.

Question by: Lee W on Sep 22, 2025, 3:38 PM

Got a 1/4 inch male NPTF on my line and need to bump up to a 3/8 female connection, this the right fitting for that?

Answer by: Customer Support on Sep 24, 2025, 6:51 AM

That's what this expander is built for. The male end is 1/4-18 NPTF and the female end opens up to 3/8-18 NPTF, so it steps your line up from the smaller connection to the larger one in a straight configuration. Both threads conform to SAE J476, so you're getting a proper dry-seal fit on each side.