2a all threaded stud thread class 0.171" all threaded stud thread length 32 all threaded stud thread quantity per inch disc unc all threaded stud thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 2.935" overall length circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 1.899" overall length tap, circular, bushing mount unef single mounting facility thread series