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Steel Adapter, 1/4-18 Female NPT To 7/8-14 Male SAE O-Ring Boss (Straight Thread O-Ring), Straight

Description & Features

The high-quality adapter from Brennan Industries Inc connects a 1/4-18 Female NPT to a 7/8-14 Male SAE O-Ring Boss. Constructed from durable steel it ensures a secure and reliable connection for industrial applications. This straight thread O-ring adapter provides an efficient and leak-free seal eliminating the need for additional thread sealant.

This component is identified under catalog number C1DY29 and suits various OEM and replacement needs.

The adapter is designed for #10 MORB X #4 FP (RIGID) specifications making it suitable for demanding environments where robustness and precise fitting are essential.

Supplier Part Number: 6405-10-04-O

MPN: 6405-10-04-O

Specifications

A 0.81	Alternate Part Numbers Alternate Part Number 6405-10-04, Alternate Part Number A2216-4-10S, Alternate Part Number C1DY29, Alternate Part Number MI-00320239, Alternate Part Number MINO-00028F65793	Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 6405-10-04-O	Thread 1 1/4-18	Thread 2 7/8-14	Thread Sealant No	Product Weight 0.14 lbs

Similar Products

Model Number	Thread 1	Thread 2	A
2216-12-12S Female NPT To Male ORB Adapter	3/4-14	1-1/16-12	1.67
2216-16-16S Female NPT To Male ORB Adapter	1-11-1/2	1-5/16-12	1.91
2216-2-4S Female NPT To Male ORB Adapter	1/8-27	7/16-20	0.92
2216-8-8S Female NPT To Male ORB Adapter	1/2-14	3/4-16	1.65
6405-24-20-O Female NPT To Male ORB Adapter	1-1/4-11-1/2	1-7/8-12	2.12
2216-12-16S Female NPT To Male ORB Adapter	3/4-14	1-5/16-12	1
2216-16-20S Female NPT To Male ORB Adapter	1-11-1/2	1-5/8-12	1
2216-20-20S Female NPT To Male ORB Adapter	1-1/4-11-1/2	1-5/8-12	2
2216-24-24S Female NPT To Male ORB Adapter	1-1/2-11-1/2	1-7/8-12	2
2216-4-5S Female NPT To Male ORB Adapter	1/4-18	1/2-20	1.2
2216-4-6S Female NPT To Male ORB Adapter	1/4-18	9/16-18	1.24
2216-6-12S Female NPT To Male ORB Adapter	3/8-18	1-1/16-12	1.34
2216-6-8S Female NPT To Male ORB Adapter	3/8-18	3/4-16	1.25
2216-8-10S Female NPT To Male ORB Adapter	1/2-14	7/8-14	1.54
2216-8-12S Female NPT To Male ORB Adapter	1/2-14	1-1/16-12	1.72
6405-04-04-O Female NPT To Male ORB Adapter	1/4-18	7/16-20	1.16
6405-04-06-O Female NPT To Male ORB Adapter	3/8-18	7/16-20	1.21
6405-05-02-O Female NPT To Male ORB Adapter	1/8-27	1/2-20	0.94
6405-06-06-O Female NPT To Male ORB Adapter	3/8-18	9/16-18	1.16
6405-06-08-O Female NPT To Male ORB Adapter	1/2-14	9/16-18	1.4
6405-08-04-O Female NPT To Male ORB Adapter	1/4-18	3/4-16	1.16
6405-10-04-O Female NPT To Male ORB Adapter	1/4-18	7/8-14	0.81
6405-10-06-O Female NPT To Male ORB Adapter	3/8-18	7/8-14	1.55
6405-12-16-O Female NPT To Male ORB Adapter	1-11-1/2	1-1/16-12	1.91
6405-16-08-O Female NPT To Male ORB Adapter	1/2-14	1-5/16-12	1.61
6405-20-12-O Female NPT To Male ORB Adapter	3/4-14	1-5/8-12	1.19
6405-24-16-O Female NPT To Male ORB Adapter	1-11-1/2	1-7/8-12	1

Product Questions & Answers (1)

Question by: Lynn M on Sep 27, 2025, 8:49 PM

Got a port on my hydraulic manifold that's threaded 7/8-14 ORB and I need to run a 1/4 NPT line off it. This the right adapter for that?

Answer by: Customer Support on Sep 29, 2025, 8:12 AM

That's what this one's built for. The male end threads into your 7/8-14 SAE O-Ring Boss port, and the female end accepts your 1/4-18 NPT fitting. The O-ring on the male side handles the seal at the boss port, so you won't need thread tape or sealant on that end. Steel construction keeps it solid under the kind of stress you'd expect in a working hydraulic system.