Downloaded from https://www.everyspec.com MIL-STD-131ZB : , . . I 1 u ,,, . 03 W AS H E R CE RRO L O W 1 OR E QU I VALE N T . A DD S H I M S AS R E QU I R E D T O M AKE P RO PE R GR I F ! -.25 :50 NOTE: -MINAL SHANK DIAMETER -. FI.GURE18. Flush head adapter. 36