NKC Air Quick Coupler / Air Coupling 1/4 NPT Model: 22SM, 22SF, 22SH & 22PF NKC Quick Connect Couplers make connecting and disconnecting air, water, and oil lines in factories, plants, and shipyards easily All NKC couplers are manufactured in Japan using quality materials, guarantee its durability and longevity for any application For low pressure, wide applications. Single valve type. The main body is made of stainless steel and is hardened to ensure high durability and a high resistance to abrasion Zinc plated finish for rust and erosion resistance Spring loaded quick release couplers which should be used on the compressor so that the air is contained when the air tool is disconnected When using the coupler(s) slide back the sleeve, push in the connector and then slide back the sleeve fully to lock in the connector Enables tools and airlines to be quickly connected / disconnected Reduces accidental airline disconnection Materials: Stainless Steel Made in Japan