2b thread class right-hand 2.764" overall length 0.615" overall width 40 thread quantity per inch bracket right hand design irregular unc thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 2.245" overall length tap, circular, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 1.899" overall length tap, circular, bushing mount unef single mounting facility thread series
Used on oj-564/u. 2b second mounting facility thread class right-hand second mounting facility 3.394" overall length 2.657" overall width 32 second mounting facility thread quantity per inch unc second mounting facility thread series