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Steel Adapter, 1-11-1/2 Male NPT To 3/4-14 Female NPT, Straight

A 2.12	Alternate Part Numbers Alternate Part Number 2040-16-12S, Alternate Part Number C1DX71, Alternate Part Number MI-00326114, Alternate Part Number MINO-00028F67740	Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 5405-16-12	Thread 1 1-11-1/2	Thread 2 3/4-14	Thread Sealant No	Product Weight 0.47 lbs

Product Questions & Answers 2

Product Questions & Answers

what's the thread size on the male end of this adapter? trying to figure out if it'll work with my existing 1" pipe fitting setup

Question by: Kirk M on May 2, 2025, 12:20 PM

The male end runs a 1-11/2 NPT thread, which is a 1-inch nominal pipe thread at 11.5 threads per inch. If your existing fittings are standard 1" NPT, this will mate up correctly. The female end steps down to 3/4-14 NPT, so this is a reducing adapter going from the larger male connection to the smaller female port.

Answer by: Customer Support on May 3, 2025, 9:23 PM

Will this here adapter work to connect a 1-11-1/2 male pipe to a 3/4-14 female pipe?

Question by: Bobby H on Aug 14, 2025, 7:39 AM

Yes, sir, this steel adapter is made to join a 1-11-1/2 male NPT to a 3/4-14 female NPT pipe, straight as an arrow.

Answer by: Customer Support on Aug 16, 2025, 7:26 AM

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Model Number	Thread 1	Thread 2	A
2040-2-4S	1/8-27	1/4-18	1.21
2040-4-8S	1/4-18	1/2-14	1.68
2040-12-12S	3/4-14	3/4-14	1.93
2040-12-16S	3/4-14	1-11-1/2	2.18
2040-16-16S	1-11-1/2	1-11-1/2	2.37
2040-16-20S	1-11-1/2	1-1/4-11-1/2	2.46
2040-2-2S	1/8-27	1/8-27	1.04
2040-4-4S	1/4-18	1/4-18	1.39
2040-4-6S	1/4-18	3/8-18	1.44
2040-6-6S	3/8-18	3/8-18	1.44
2040-6-8S	3/8-18	1/2-14	1.68
2040-8-12S	1/2-14	3/4-14	1.93
2040-8-8S	1/2-14	1/2-14	1.87
5405-06-04	3/8-18	1/4-18	1.44
5405-08-06	1/2-14	3/8-18	1.85
5405-08-16	1/2-14	1-11-1/2	2.18
5405-12-06	3/4-14	3/8-18	1.63
5405-12-08	3/4-14	1/2-14	1.94
5405-16-12	1-11-1/2	3/4-14	2.12