2a single mounting facility thread class 0.375" single mounting facility thread length 1.906" overall length circular wafer, bushing mount unef single mounting facility thread series
2b thread class right-hand 1.510" overall length 18 thread quantity per inch contains crommet with 47 holes, 1 for no. 12 cadmium surface treated single clamping action w or w/o bushing uns thread series
2b thread class right-hand 1.291" overall length 18 thread quantity per inch contains grommet with 14 holes, 2 for no. 4 cadmium surface treated environmental type uns thread series