Used on 2350-01-031-0586. 3b 2nd end thread class 1.625-18unef-2a ext thd 0.469 lg 0.8125 from end; wrenching feature 1.125 w across flats second end; ring groove 0.215 w x 1.282 dia 0.156 from first end; thd relief o.095 lg x 1.375 dia; 1.281 dia x 0.015 boss first end anodize surface treated unf 2nd end thread series