Value Brand Square Head Plug 1/2" MNPT Malleable 5P543

1/2" Male NPT Square Head Plug

This malleable iron fitting provides a 1/2 inch male NPT thread for sealing pipe ends in plumbing systems. It is intended for installers who need a Class 150 rated closure with a square head for wrench engagement. The product ships new and carries California Proposition 65 warnings for cancer and reproductive harm. It is not for buyers who need a hex head or a different thread standard.

Class 150 pressure rating

The fitting handles pressures up to Class 150 and operates continuously from -20 to 366 degrees Fahrenheit. This headroom covers typical residential and light commercial water, air, and steam lines. It runs out for high-pressure hydraulic circuits or cryogenic service beyond the stated temperature limits. No pre-applied thread sealant is included, so the installer must supply their own.

Malleable iron construction with square head

The cored malleable iron body resists cracking under mechanical stress better than cast iron. The square head allows a standard wrench to apply torque during installation or removal without rounding corners. Male NPT threads seal with tape or compound applied on site. The plain finish requires no special tools, but the material is not suited for highly corrosive fluids without additional protection.