Skip to the beginning of the images gallery

Steel Adapter, 1-11-1/2 Female NPT To 1-7/8-12 Male SAE O-Ring Boss (Straight Thread O-Ring), Straight

A 1	Alternate Part Numbers Alternate Part Number 6405-24-16, Alternate Part Number A2216-16-24S, Alternate Part Number C1BX62	Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 6405-24-16-O	Thread 1 1-11-1/2	Thread 2 1-7/8-12	Thread Sealant No	Product Weight 0.58 lbs

Product Questions & Answers 2

Product Questions & Answers

Will this adapter work to connect a 1-11 1/2 female NPT fitting to a 1-7/8-12 male SAE O-ring boss?

Question by: Troy C on Mar 13, 2026, 5:35 PM

Yes, this adapter is designed to connect a 1-11 1/2 female NPT to a 1-7/8-12 male SAE O-ring boss.

Answer by: Customer Support on Mar 15, 2026, 5:20 PM

got a 1-inch female NPT port on a hydraulic manifold and need to tie into a SAE O-ring boss line, this the right adapter for that?

Question by: Shane C on Oct 30, 2025, 9:06 AM

That's what this piece is built for. One end is 1-11/2 female NPT, so it threads right onto a standard 1-inch pipe thread port. The other end is 1-7/8-12 male SAE O-Ring Boss, which is your straight thread O-ring connection. Steel construction, straight configuration, no angle or offset. If your manifold has a 1-inch NPT port and your line fitting is a #24 ORB, you're looking at the right adapter.

Answer by: Customer Support on Nov 1, 2025, 9:00 AM

Similar Products

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