2a 1st end thread class 12 1st end thread quantity per inch truck, forklift, diesel engine driven, 6000 lb.; anthony model mlt 6-2, nsn 3930003271575 cadmium surface treated un 1st end thread series
3a 2nd end thread class 12 1st end thread quantity per inch 1st end bulkhead thd size 1.875 in. nom, cl 3a, unf anodize surface treated un 1st end thread series
3a all ends thread class 12 all ends thread quantity per inch ist end buldhead thd size 1.875 in. nom, cl 3a, unf anodize surface treated un all ends thread series
Used on supports grumman a-10 acft. 3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch passivate surface treated unj 1st end bulkhead thread series
3a 1st end bulkhead thread class color yellow; drill no. 7, 0.201 in. dia, 0.562 in. deep, tap 0.250-20unc-2b thsd size, 0.438 in. deep per mil-s-7742 unjf all ends thread series