Foster 310-42, 3/8" ARO Plug x 3/8" Male NPT, 310 Series, Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-42 is a steel 3/8" plug from the Foster 310 Series, rated to 300 PSI and built in the USA for shop air, tools, and pneumatic service.

Specifications

• Brand: Foster
• Series: 310 Series (ARO 310 Interchange)
• Part Number: 310-42
• Interchange: 3/8" ARO 310
• Body: 3/8" Plug
• Thread: 3/8" Male NPT, MPT
• Type: One-Way Shut-Off
• Material: Steel
• Working Pressure: 300 PSI
• Temperature Range: -40F to +250F (Buna seal)
• Quantity: 1pc
• Origin: Made in USA

Why this plug

• ARO 310 interchange — which means it plugs into any matching ARO 310-style 3/8" socket.
• Steel — which means durable service under repeated high-pressure cycling.

Frequently asked questions

What does this connect to?
It interchanges with ARO 310 Series sockets — a widely used 3/8" air-coupler style.

What pressure is it rated for?
Rated to 300 PSI working pressure, -40F to +250F with Buna seals.

Ideal for shop air lines, pneumatic tools, and air service. Pair this plug with a matching 3/8" ARO 310 socket for a complete, leak-free connection.

Why buy from hpcouplers: Foster quality, responsive US-based support, accurate specs, fast shipping.