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4MOR-4MP

Description & Features

The 4MOR-4MP from Brennan Industries Inc is designed for industrial applications. This straight fitting is fabricated from straight steel ensuring optimal strength and performance. It features a male SAE O-Ring Boss (SAE J514) on one end and a male NPTF (SAE J476) on the other providing versatile threading compatibility.

An NBR O-Ring is included to ensure a secure seal. The overall length is 1.230 mm making it compact yet highly functional. The thread sizes are 7/16-20 for B1 and 1/4-18 for B2 with corresponding drill diameters of 0.172 mm and 0.281 mm.

This fitting is part of the 6401-O series known for its robust design and reliable performance in demanding environments. Ideal for use in mechanical and industrial sectors it meets stringent industry specifications for durability and efficiency.

Supplier Part Number: 6401-04-04-O

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 6401-04-04-O	Product Weight 0.06 lbs

Product Questions & Answers (2)

Question by: Clint M on Oct 30, 2025, 7:40 PM

What kind of seal does this fitting use? Just want to make sure I get the right replacement O-rings down the road.

Answer by: Customer Support on Nov 1, 2025, 2:54 PM

This fitting uses an NBR O-Ring to ensure a secure seal, so you'll want to look for replacements made of that material.

Question by: Cody H on Jul 19, 2025, 10:02 AM

what's the thread setup on this fitting, one end NPT and the other an o-ring boss?

Answer by: Customer Support on Jul 20, 2025, 5:28 PM

That's right. One end is a 7/16-20 Male SAE O-Ring Boss, which follows SAE J514 spec, and the other is a 1/4-18 Male NPTF per SAE J476. The NBR o-ring is already included, so you're not hunting down a separate seal to get it buttoned up. Straight steel construction throughout.