Milton 726 1/8" MNPT M-STYLE® Plug (Box of 10) BL-1204-164 or simply just being checked

or simply just being checked for calibration accuracy

These downtubes can be added to stub pumps in tanks and drums using low-level cutoff (321206)

For use on Hunter TC3900

1/4" NPT x 1/4" NPTF

Milton 726 1/8" MNPT M-STYLE® Plug (Box of 10) BL-1204-164 or simply just being checked1 8" MNPT M STYLE Plug (Box of 10) 1 8" male national pipe thread Maximum pressure of 300 pounds per square inch Air flow of 40 standard cubic feet per minute Maximum temperature of 250 degrees Fahrenheit Complies with military specifications MIL C 4109 1 8" MNPT M Style plugs have a 1 4" basic flow size and a maximum pressure of 300 PSI. The industry standard M Style couplers come with a Buna N seal and air flow of 40 SCFM. M Style plugs are made of