MIL-S-63540C (NOTICE 3), MILITARY SPECIFICATION: STUD, SELF-CLINCHING, GENERAL SPECIFICATION FOR (24 MAY 2000) [S/S BY NASM63540]., MIL-S-63540C, dated 27 June 1995, is hereby canceled and superseded by NASM63540.The Part Identification Number (PIN) for MIL-S-63540C and the part number for NASM63540 are identical. The partnumbers have not been changed.