Foster 310M-4304NP, 3/8" ARO Coupler x 3/8" Male NPT, 310 Series, Manual, Nickel-Plated Brass/Steel
Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310M-4304NP is a nickel-plated brass/steel 3/8" coupler 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: 310M-4304NP
- Interchange: 3/8" ARO 310
- Body: 3/8" Coupler
- Thread: 3/8" Male NPT, MPT
- Type: One-Way Shut-Off
- Operation: Manual sleeve (retract to connect and disconnect)
- Material: Nickel-Plated Brass/Steel
- Working Pressure: 300 PSI
- Temperature Range: -40F to +250F (Buna seal)
- Quantity: 1pc
- Origin: Made in USA
Why this coupler
- Manual sleeve operation — which means a positive, deliberate connect/disconnect by retracting the socket sleeve.
- ARO 310 interchange — which means it mates with industry-standard ARO 310-style 3/8" air fittings.
- Nickel-plated finish — which means added corrosion resistance and a clean appearance.
Frequently asked questions
What does this connect to?
It interchanges with ARO 310 Series plugs — 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.
How does it connect?
Retract the socket sleeve to connect and to disconnect (manual operation).
Ideal for shop air lines, pneumatic tools, and air service. Pair this coupler with a matching 3/8" ARO 310 plug for a complete, leak-free connection.
Why buy from hpcouplers: Foster quality, responsive US-based support, accurate specs, fast shipping.