04 SQUARE HEAD PIPE PLUG

Description & Features

Manufactured from straight steel, this 1/4-18 Male NPTF square head pipe plug is designed to seal unused ports and threaded openings in hydraulic systems and industrial fluid circuits. The square head drive style provides reliable torque engagement during installation and removal using standard wrenches, making it a practical choice for maintenance-intensive environments.

Conforming to SAE J476, the 04 Square Head Pipe Plug carries a 1/4-18 NPTF thread specification, with an overall length of 0.750 inches and a drill size of 0.281 inches. The NPTF thread form creates a pressure-tight mechanical seal without the need for additional sealant, suited for use in hydraulic and pneumatic port applications. Manufactured by Brennan Industries, this plug is subject to California Proposition 65 requirements.

SKU: 5406-SHP-04

Supplier Part Number (MPN): 5406-SHP-04

Specifications

Brand
BRENNAN
Connection Size 1
1/4 in
Connection Type
MNPT
Connection Type 1
Male NPTF
Dimension Standards
SAE J476
Dimensions
0.76 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Plug
Hex Size
3/8 in
Material
Steel
Material Construction
AISI 12L14/1045 Steel
Maximum Operating Pressure
6000 psi
Series
5406-SHP Series
Thread B1 Drill Dimensions
0.281 in
Thread Size
1/4-18

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Product Questions & Answers (1)

Question by: Peggy T on Jun 17, 2025, 6:06 PM
How long is this plug, end to end?
Answer by: Customer Support on Jun 19, 2025, 5:48 PM
It measures 0.750 inches overall.

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