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Steel Adapter, 1-1/2-11-1/2 Male NPT Countersunk Hex Plug

Description & Features

Constructed from high-grade steel this adapter ensures robust and reliable performance in various industrial applications. Its 1-1/2-11-1/2 Male NPT threading guarantees a secure and precise fit minimizing potential leaks and maintaining system integrity. The countersunk hex design allows for easy installation and removal using standard Allen tools.

This component manufactured by Brennan Industries Inc. is engineered for optimal durability and efficiency. The steel adapter is ideal for projects requiring a dependable connection between male NPT threaded fittings. Designed without a thread sealant it offers flexibility for users who prefer to apply their own sealing solutions.

This Plug supports hassle-free maintenance by simplifying the installation and removal processes. With precise engineering and a robust steel build it meets stringent industrial standards.

Supplier Part Number: 5406-HP-24

Specifications

A 0.83	Alternate Part Numbers Alternate Part Number 5406-HHP-24, Alternate Part Number A2222-24S, Alternate Part Number C1FN19, Alternate Part Number MI-00347853, Alternate Part Number MINO-00028F82908	B 1	Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 5406-HP-24	Thread 1 1-1/2-11-1/2	Thread Sealant No	Product Weight 0.50 lbs

Similar Products

Model Number	Thread 1	A	B
2222-6S Steel NPT Socket Hex Plug	3/8-18	0.46	0.31
2222-8S Steel NPT Socket Hex Plug	1/2-14	0.61	0.38
2222-2S Steel NPT Socket Hex Plug	1/8-27	0.3	0.19
2222-4S Steel NPT Socket Hex Plug	1/4-18	0.46	0.25
5406-HP-12 Steel NPT Socket Hex Plug	3/4-14	0.62	0.56
5406-HP-16 Steel NPT Socket Hex Plug	1-11-1/2	0.77	0.63
5406-HP-20 Steel NPT Socket Hex Plug	1-1/4-11-1/2	0.83	0.75
5406-HP-24 Steel NPT Socket Hex Plug	1-1/2-11-1/2	0.83	1

Product Questions & Answers (3)

Question by: Randy H on Dec 25, 2025, 9:58 AM

got a port i need to cap off, is this the kind of plug that’ll do it if the threads are 1-1/2-11-1/2 npt?

Answer by: Customer Support on Dec 27, 2025, 8:39 AM

For capping off a 1-1/2-11-1/2 male NPT connection, this is a steel countersunk hex plug with that exact male NPT thread, so it’s meant to thread in securely and help minimize leaks when installed properly.

Question by: Cody M on Sep 17, 2025, 6:22 PM

what tool do i need to pull this plug out if i gotta get in there for maintenance?

Answer by: Customer Support on Sep 19, 2025, 5:09 PM

A standard Allen wrench handles it. The countersunk hex design means you're not dealing with a traditional hex head on the outside, so a hex key or Allen socket in the right size is what you want. Makes it pretty straightforward to swap out without a lot of fuss.

Question by: Sherry M on Aug 4, 2025, 6:43 PM

What size Allen wrench do I need for this plug?

Answer by: Customer Support on Aug 6, 2025, 6:41 AM

This plug uses a countersunk hex design, so standard Allen tools should work for installation and removal.