2a single mounting facility thread class 0.375" single mounting facility thread length 2.125" overall length circular wafer, bushing mount unef single mounting facility thread series
3a thread class right-hand 1.410" overall length 20 thread quantity per inch critical spare parts for T56 aircraft engine listed on T56 engine critical parts list unef thread series
2a single mounting facility thread class 0.312" single mounting facility thread length 2.125" overall length 2.000" overall width square wafer, panel mount unef single mounting facility thread series