"5 In ONE™ Universal Safety Exhaust Coupler – 3/8"" NPT Milton's 5 In ONE™ Universal Industrial Safety Exhaust couplers are designed to safely bleed off air pressure before releasing the connector. The safety exhaust feature allows for safe disconnection, eliminating potentially dangerous hose whip. The coupler remains connected to the plug while pressurized air is safely bled off. Constructed of heavy-duty steel which is ideal for applications requiring a durable and long lasting pneumatic coupler. Connects to all major interchanges: Industrial (M-style), High flow (v-style), automotive (t-style), Aro (A-style), and Lincoln (L-Style). Specifications: Compatible with Industrial (M-style), High flow (v-style), automotive (t-style), Aro (A-style), and Lincoln (L-Style) - 3/8” NPT - Female