Mac Tools toolbox 1605
Mack trucks pre-cut DAV10
Mag patio door AGE2, A191 (Taylor)
Magic Eye   999
Magnum padlock  1092D 
Mag wheel lock   1127ES, 1041T, O1122
Mailboxes See name brand  
Markon   1069N
Mark   999
Marks   1179, 1145
Marlette RV 1054WB
Master padlocks See Ilco #60
Mastercraft tool box 1054UN
McDowell Craig   O1122
McGunn safe BD551
Medalist   R1064E, 1069N
Medart   1326, 1332, 1332S
Medeco restricted, plus: 1515, A1515, 1517, A1517, 1518, 1542, 1543
Melex golf cart OKB12
Mercury outboard motors See Ilco #60
Meroni furniture locks MER2, MER23, MER24
Mer-Pel vending OKB159
Metal vent   1022
Metal-Rousseau   MR1, MR2, M64
Micro-Switch USA   HV61
Mister Minute   999
Mitchell   1041T
MMF   1041T, O1122
Mobella   OKB6, BDK6R
Moleba   O1122, O1122A
Monarch   X1054K
Monterey   O1122
Montgomery Ward freezers 1069N
Mortise Sears lock sets 1092N
Moss   1145, 1054K, D1054K, 1176
Moto Ski   O1122, O1122A
Multi-Lock 1022   1022