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Steel Adapter, 1/2-20 Male NPT To 7/16-20 Female SAE O-Ring Boss (Straight Thread O-Ring), Straight

Description & Features

The steel adapter facilitates seamless transitions between 1/2-20 Male NPT and 7/16-20 Female SAE O-Ring Boss, designed by Brennan Industries Inc. Ideal for industrial applications, this adapter supports precision and reliability in connections.

Highly durable and corrosion-resistant, the adapter ensures long-lasting performance even in demanding environments.

The straight thread O-Ring configuration adds another layer of security, minimizing potential leaks.

This adapter seamlessly aligns with various industrial standards, enhancing the operational efficiency of complex systems.

Its robust construction and precise threading make it an integral component in high-pressure systems.

Ensuring a secure fit, the 5/16 FORB-1/4 MP Straight adapter offers a reliable and efficient solution for specific industrial needs.

Supplier Part Number: 6404-05-04

Specifications

A 1.39	Alternate Part Numbers Alternate Part Number C1BX32, Alternate Part Number MI-02157826, Alternate Part Number MINO-00028F01806	Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 6404-05-04	Thread 1 1/2-20	Thread 2 7/16-20	Thread Sealant No	Product Weight 0.10 lbs

Similar Products

Model Number	Thread 1	Thread 2	A
2246-4-6S Male NPT To Female ORB Adapter	1/4-18	9/16-18	1.36
2246-6-8S Male NPT To Female ORB Adapter	3/8-18	3/4-16	1.45
6404-04-04 Male NPT To Female ORB Adapter	1/4-18	7/16-20	1.32
2246-12-12S Male NPT To Female ORB Adapter	3/4-14	1-1/16-12	1.92
2246-16-16S Male NPT To Female ORB Adapter	1-11-1/2	1-5/16-12	1.91
2246-2-4S Male NPT To Female ORB Adapter	1/8-27	7/16-20	1.09
2246-8-10S Male NPT To Female ORB Adapter	1/2-14	7/8-14	1.78
6404-04-06 Male NPT To Female ORB Adapter	3/8-18	7/16-20	1.13
6404-05-04 Male NPT To Female ORB Adapter	1/2-20	7/16-20	1.39
6404-06-06 Male NPT To Female ORB Adapter	3/8-18	9/16-18	1.39
6404-08-08 Male NPT To Female ORB Adapter	1/2-14	3/4-16	1.7

Product Questions & Answers (3)

Question by: Lance M on Sep 6, 2025, 10:33 AM

trying to replace a fitting i pulled off a line, is this the one that goes from 1/2-20 male NPT over to a 7/16-20 female ORB?

Answer by: Customer Support on Sep 8, 2025, 6:15 AM

Match the threads and you are in the right ballpark. This adapter is a straight steel piece with a 1/2-20 Male NPT on one end and a 7/16-20 Female SAE O-Ring Boss (straight thread O-ring) on the other.

Question by: Larry T on Mar 15, 2026, 7:00 PM

Got a line running 1/2-20 NPT fittings and need to tie into a 7/16-20 SAE O-Ring Boss port. this adapter do that job?

Answer by: Customer Support on Mar 17, 2026, 6:32 AM

That's what it's built for. One end is 1/2-20 Male NPT and the other is 7/16-20 Female SAE O-Ring Boss, so it bridges those two thread standards in a single straight fitting. The O-Ring Boss end uses a straight thread with an O-ring seal, which keeps the connection tight and cuts down on leak points compared to a tapered thread alone. Made by Brennan Industries out of steel, so it holds up well in demanding conditions.

Question by: Terry C on Dec 17, 2025, 9:53 PM

Will this here adapter work to hook up a 1/2 NPT to a 7/16 SAE O-ring?

Answer by: Customer Support on Dec 19, 2025, 4:45 PM

This adapter is designed to provide a direct connection between a 1/2-20 Male NPT and a 7/16-20 Female SAE O-Ring Boss.