16 products
1/2" Black Iron Square Head Plug - Fittings N' Valves
1/4" Black Iron Square Head Plug - Fittings N' Valves
3/8" Black Iron Square Head Plug - Fittings N' Valves
3/4" Black Iron Square Head Plug - Fittings N' Valves
1/8" Black Iron Square Head Plug - Fittings N' Valves
1" Black Iron Square Head Plug - Fittings N' Valves
1-1/4" Black Iron Square Head Plug - Fittings N' Valves
1" Black Iron Solid Square Head Plug - Fittings N' Valves
1-1/2" Black Iron Square Head Plug - Fittings N' Valves
2" Black Iron Square Head Plug - Fittings N' Valves
2-1/2" Black Iron Square Head Plug - Fittings N' Valves
3" Black Iron Square Head Plug - Fittings N' Valves
4" Black Iron Square Head Plug - Fittings N' Valves
6" Black Iron Square Head Plug - Fittings N' Valves
5" Black Iron Square Head Plug - Fittings N' Valves
5" Black Iron NPT Threaded Cored Bar Plug - UL/FM - Fittings N' Valves
What Is a Square Head Plug?

A square head plug threads into a female fitting to close it off, with a raised square boss for wrenching it tight.

This collection shows imported black iron square head plugs.