2a single mounting facility thread class 0.250" single mounting facility thread length 1.338" overall length snap or line unf single mounting facility thread series
2a single mounting facility thread class 0.292" single mounting facility thread length 2.554" overall length tap, circular, bushing mount unef single mounting facility thread series
2a thread class right-hand 2.407" overall length 0.675" overall width female screwlock position a-1, guide socket position a-4, guide pin position 1, male screw lock position 4, and bracket on a-4 side unc thread series