Prevost Safety Air Plug Coupler ISI061202 3/8" FNPT (3-Pack) 3 Pack Prevost ISI061202 1/4" body air coupler with 3/8" FNPT inlet threads. These high quality Prevost couplers feature a non-marring, impact resistant, high grade composite body. These couplers are easy to use for anyone and are built for safety and high efficiency! The quick release button on these allow you to easily release plugs with one hand! It also purges the air on everything down line, such as air hoses and tools, so that there is no hose whipping or sudden pressure releases. These couplers features a 1/4" body and has a 3/8" FNPT threaded inlet. These couplers are compatible with Prevost Industrial Interchange Style air plugs. Specifications: 3/8" Female NPT Accepts 1/4" Plugs Easy To Use Anti-marring Heavy Duty Composite Body Steel Inner Construction