2a 2nd end thread class two lockwire holes .065 to .075 in. dia located .250 to .310 from center of hex rigid, short center wrenching facility unf 2nd end thread series
Used on engine, aircraft j-52. 3b thread class right-hand 18 thread quantity per inch one hole 0.187 in.dia drilled through hex for locking purpose silver surface treated
Used on aircraft, t-37. 3a all ends thread class 3.438" overall length fluid end is a bulkhead fitting anodize body surface treated male coupling half unjf all ends thread series
3a all ends thread class 3.220" overall length 12 all ends thread quantity per inch anodize body surface treated male coupling half un all ends thread series
Used on aircraft, t-38. 3a all ends thread class 4.000" overall length fluid end is a bulkhead fitting anodize body surface treated male coupling half unf all ends thread series
Used on aircraft, t-38. 3a all ends thread class 4.150" overall length 12 all ends thread quantity per inch body anodized blue; bulkhead threads on fluid end connection anodize body surface treated male coupling half unj all ends thread series
