Hardened steel ballsStainless-steel springsHeat-treated and platedMade in the USA
These plated steel couplers have hardened steel balls and stainless-steel springs. The plugs are heat-treated and plated to reduce wear on critical mating surfaces. M style plugs have a 1/4" basic flow size and air flow of 40 SCFM. These plugs have a maximum pressure of 300 PSI. All threads are NPT. Made in the USA.
Brand: Milton, Model: 728BK, Size: 1