2a single mounting facility thread class 0.410" single mounting facility thread length 1.830" overall length tap, circular, bushing mount unef single mounting facility thread series
1.540" overall length 0.240" overall width left side d-shaped pin guide rotated 180 @deg, right side d-shaped socket guide rotated 180 deg clockwise from normal
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