MIL-S-18729C (AMENDMENT 1), MILITARY SPECIFICATION, STEEL PLATE, SHEET, AND STRIP, ALLOY, 4130, AIRCRAFT QUALITY (28 APR 1966) [S/S BY SAE-AMS6350, SAE-AMS6351 OR SAE-AMS6345].
MIL-S-18729C (AMENDMENT 1), MILITARY SPECIFICATION, STEEL PLATE, SHEET, AND STRIP, ALLOY, 4130, AIRCRAFT QUALITY (28 APR 1966) [S/S BY SAE-AMS6350, SAE-AMS6351 OR SAE-AMS6345].