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Steel Adapter, 1-1/2-11-1/2 Male NPT To 3/8-18 Female NPT, Bushing

A 1.57	Alternate Part Numbers Alternate Part Number 2081-24-6S, Alternate Part Number A2081-24-6S, Alternate Part Number C1DX76	Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 5406-24-06	Thread 1 1-1/2-11-1/2	Thread 2 3/8-18	Thread Sealant No	Product Weight 1.17 lbs

Product Questions & Answers 2

Product Questions & Answers

What size threads does this adapter use? I need to make sure it'll fit my setup.

Question by: Steve P on Nov 1, 2025, 4:59 PM

This steel adapter uses 1-1/2-11-1/2 Male NPT on one end and 3/8-18 Female NPT on the other. Those sizes should allow a secure connection in various industrial applications.

Answer by: Customer Support on Nov 3, 2025, 6:48 AM

does this bushing need any thread sealant or tape when you put it together, or is it good to go as-is?

Question by: Wayne B on Aug 16, 2025, 7:19 AM

No sealant needed on this one. The NPT threads are self-sealing by design, so you can install it straight out of the box without tape or compound. That cuts down on prep time and keeps things clean around the fitting.

Answer by: Customer Support on Aug 17, 2025, 12:17 PM

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Model Number	Thread 1	Thread 2	A
2081-12-4S	3/4-14	1/4-18	1.17
2081-12-6S	3/4-14	3/8-18	1.17
2081-12-8S	3/4-14	1/2-14	1.17
2081-16-8S	1-11-1/2	1/2-14	1.36
2081-20-12S	1-1/4-11-1/2	3/4-14	1.47
2081-20-16S	1-1/4-11-1/2	1-11-1/2	1.47
2081-24-16S	1-1/2-11-1/2	1-11-1/2	1.57
2081-24-20S	1-1/2-11-1/2	1-1/4-11-1/2	1.57
2081-32-20S	2-11-1/2	1-1/4-11-1/2	1.75
2081-32-24S	2-11-1/2	1-1/2-11-1/2	1.75
2081-6-4S	3/8-18	1/4-18	0.85
2081-8-4S	1/2-14	1/4-18	1.1
2081-8-6S	1/2-14	3/8-18	1.1
2081-16-12S	1-11-1/2	3/4-14	1.36
2081-16-6S	1-11-1/2	3/8-18	1.36
2081-24-12S	1-1/2-11-1/2	3/4-14	1.57
2081-32-16S	2-11-1/2	1-11-1/2	1.75
2081-4-2S	1/4-18	1/8-27	0.85
2081-6-2S	3/8-18	1/8-27	0.85
2081-8-2S	1/2-14	1/8-27	1.1
5406-20-08	1-1/4-11-1/2	1/2-14	1.47
5406-24-06	1-1/2-11-1/2	3/8-18	1.57