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20 EXTERNAL HEX PIPE PLUG

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Description & Features

The 20 External Hex Pipe Plug from Brennan Industries Inc. offers a robust solution designed for industrial applications requiring secure sealing. Manufactured from high-quality straight steel this plug ensures excellent durability and performance.

Compliant with SAE J476 specifications the male NPTF thread provides a dependable connection making it a reliable choice for industrial requirements. With an overall length of 1.470 mm and an additional length of 0.500 mm it fits seamlessly into your existing setups optimizing space without sacrificing reliability.

The hex head design facilitates easy installation and removal enhancing user convenience. The 20 External Hex Pipe Plug features precise threading with dimensions of 1-1/4-11-1/2 meeting exacting standards for consistent performance in demanding environments.

Supplier Part Number: 5406-P-20

Note: California residents should be aware of the Prop-65 warning associated with this product.

Specifications

Brand
BRENNAN
Connection Size 1
1-1/4 in
Connection Type
MNPT
Connection Type 1
Male NPTF
Dimension Standards
SAE J476
Dimensions
1.47 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Plug
Hex Size
1-3/4 in
l2 Dimensions
1/2 in
Material
Steel
Material Construction
AISI 12L14/1045 Steel
Maximum Operating Pressure
3000 psi
Series
5406-P Series
Thread B1 Drill Dimensions
1.142 in
Thread Size
1-1/4-11-1/2

Product Questions & Answers (2)

Question by: Ricky W on Mar 26, 2026, 8:18 PM
got a port i need to cap off, is this plug the one with the 1-1/4-11-1/2 male nptf threads?
Answer by: Customer Support on Mar 28, 2026, 6:03 AM
For thread fit, you want to match the 1-1/4-11-1/2 male NPTF thread. This plug is exactly that, and it’s built to the SAE J476 thread specification.
Question by: Billy H on Jan 16, 2026, 8:19 PM
Thread size on this one is 1-1/4-11-1/2 NPTF -- that right for a standard 1-1/4 inch pipe fitting port?
Answer by: Customer Support on Jan 18, 2026, 6:11 AM
Yeah, that matches up. The 1-1/4-11-1/2 thread is the standard NPTF size for a 1-1/4 inch port, and this plug is built to SAE J476 spec, so it'll seat the way you'd expect in a properly tapped NPTF port. The male NPTF thread is a dry-seal design, meaning it relies on thread interference to hold pressure rather than needing extra sealer in most cases.

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