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

Description & Features

This steel adapter is engineered for applications requiring a secure and reliable connection between two different sizes of NPT threads. Featuring a 1-11-1/2 Female NPT Swivel on one end and a 3/4-14 Female NPT on the other it offers versatility and high performance for industrial use.

Manufactured by Brennan Industries Inc this adapter ensures robust durability and long-lasting function. Its straight design allows for seamless integration within pipe to pipe systems. The absence of thread sealant increases adaptability for various installations.

Designed to meet demanding operational standards this adapter is ideal for maintaining integrity in complex assemblies. With its precise construction it is tailored to fit stringent requirements for industrial environments.

MPN: 1405-12-16

Supplier Part Number: 1405-12-16

Specifications

A 1.92	Alternate Part Numbers Alternate Part Number A2046-16-12S, Alternate Part Number C1EF52	Brand Tompkins Industries Inc.	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 1405-12-16	Thread 1 1-11-1/2	Thread 2 3/4-14	Thread Sealant No	Product Weight 0.69 lbs

Similar Products

Model Number	Thread 1	Thread 2	A
2046-4-4S Steel Female NPT Coupling	1/4-18	1/4-18	1.12
1405-06-08 Steel Female NPT Coupling	1/2-14	3/8-18	1.36
1405-12-16 Steel Female NPT Coupling	1-11-1/2	3/4-14	1.92
2046-12-12S Steel Female NPT Coupling	3/4-14	3/4-14	1.62
2046-16-16S Steel Female NPT Coupling	1-11-1/2	1-11-1/2	2
2046-2-2S Steel Female NPT Coupling	1/8-27	1/8-27	0.88
2046-20-20S Steel Female NPT Coupling	1-1/4-11-1/2	1-1/4-11-1/2	2
2046-24-24S Steel Female NPT Coupling	1-1/2-11-1/2	1-1/2-11-1/2	2
2046-32-32S Steel Female NPT Coupling	2-11-1/2	2-11-1/2	2.3
2046-6-6S Steel Female NPT Coupling	3/8-18	3/8-18	1.12
2046-8-8S Steel Female NPT Coupling	1/2-14	1/2-14	1.5

Product Questions & Answers (2)

Question by: Ronnie M on Nov 27, 2025, 3:05 PM

got a 1-inch female NPT port on my manifold and need to tie into a 3/4 female NPT line, is this the adapter that bridges those two sizes?

Answer by: Customer Support on Nov 28, 2025, 8:41 PM

Yeah, that's exactly what this one does. One end is a 1-11/2 female NPT swivel and the other is a 3/4-14 female NPT, so it steps down from the larger inch thread to the smaller three-quarter. The swivel end gives you a little flexibility when you're lining things up during install, which helps a lot when the ports aren't perfectly aligned right out of the gate.

Question by: Randy G on Jan 20, 2026, 5:27 PM

got a 1-11-1/2 female npt swivel on one side and need to step down to 3/4-14 female npt on the other, is that what this adapter does

Answer by: Customer Support on Jan 22, 2026, 2:30 PM

Built for joining two different NPT female thread sizes, it connects a 1-11-1/2 female NPT swivel end to a 3/4-14 female NPT end in a straight, pipe to pipe setup.