Used on j-57 aircraft engine. 2b internal thread class right-hand internal 12 internal thread quantity per inch cap, tube, flared unc internal thread series
3a all ends thread class 3.068" overall length 12 all ends thread quantity per inch grumman aircraft corp, a-10 aircraft model anodize body surface treated male coupling half un all ends thread series
Used on aircraft, delta dart f-106. 3b all ends thread class flange located 1.250 in.from fluid connection end chromium body surface treated male coupling half unjf all ends thread series
