Used on truck, family or medium tactical vehicle (fm tv)- medium. 14 all ends thread quantity per inch truck, dump zinc surface treated short nptf all ends thread series
Used on skid mounted. 3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch k denotes corrosion resistant steel, type 316 passivate surface treated threaded unj 1st end bulkhead thread series
Used on skid mounted; engine, aircraft t-700 (h-60).. 3a 3rd end thread class 12 1st end bulkhead thread quantity per inch k denotes type 316, corrosion resistant stel passivate surface treated unj 1st end bulkhead thread series