Connect ZSi-Foster O Series 1/4" x 3/8" FPT Steel Plugs for a secure fit. The 210 Series Sockets are available manual or automatic to connect designs and interchange with 1?4" body size ARO 210 series plugs. Type: One-Way Shut-Off Rated Pressure: 300 psig Temperature Range: -40° to +250° Locking Device: Stainless Steel Pins

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