Connect Male BSPP (ISO 228/1) parallel thread pressure gauge or other Male BSPP device to a Ralston hand pump or nitrogen calibration equipment.

• Connect pressure gauges with Male BSPP connection to Ralston hand pumps, nitrogen calibration devices or any male Quick-test adapter
• A seal is made using a bonded seal ring or copper crush washer for pressure gauges with male BSPP connections
• Made in USA