3a thread class left-hand 1.2800" overall length 0.1895" bore diameter 28 thread quantity per inch max radial clearance 0.0005, NAS559 keyway in shank chromium inner member surface treated ball type unf thread series
Used on m48a5 combat tank. drawing shows 3 different commercial styles; dimensions 6.2982 in min 6.2992 in max outside dia, 2.9522 in min 2.9528 in max inside dia, 2.165 in wide
17.00mm overall width 20.00mm bore diameter heat stabilized from minus 65 deg f to 1073 deg f; 0.0630 in. corner radius both sides outer ring counterbored outer ring, non-separable