DRUM C/O THE FOLLOWING DIM. LISTED ON DWG NO. FSCM19207 P/N 10908345; OVERALL HEIGHT 24.000 INS.; DRUM LG 17.000 INS; BASE CIRCLE DIA ID IS 9.645 + 9.680; 11 HOLES EA END AT 0.500 DIA AND 1.250 IN. DEEP; STEELGRADE 105 TO 185;DRUM IS SYMMETRICAL EXCEPT FOR CABLE ANCHOR AND OPTIONAL GROOVES; ITEM WILL BE PHOSHATE COATED IN ACCORDANCE WITH SPEC MIL-P-16232