Used on b-1b acft. 0.3887" overall width 1.3778" bore diameter silver plate separator 0.001-0.002 thk per ams 2410 finish AA63 on non control surfaces 252a single row, non-locating, two lip inner ring, cylindrical outer ring, separable
3a thread class right-hand 3.7500" overall length 0.7495" bore diameter 16 thread quantity per inch tin alloy surface treated ball type unf thread series
3a thread class left-hand 3.7500" overall length 0.7495" bore diameter 16 thread quantity per inch tin alloy surface treated ball type unf thread series