Air pressure gauge. P/N 7954512, alternate p/n 508A, 10500706, 1508002. NSN 6685005153478. Can be used to replace 12276938, NSN 6685011095695.
Note- this is a mechanical pressure gauge, no electrical power required. 1/8 inch male pipe thread fitting for input pressure line. Attaches to hose p/n 8741776.
Can also be used to monitor oil or fuel pressure. Do not exceed 120 PSI input pressure.