2b thread class right-hand 2.000" overall length 0.875" overall width 40 thread quantity per inch guide pin left side 0.110 in. dia, guide pin right side 0.090 in. dia unc thread series
2a thread class right-hand 2.750" overall length 1.531" overall width 24 thread quantity per inch left side guide pin 0.140 in. dia, right side guide pin 0.120 in. dia unc thread series