Mark's Locksmith
| Sabre | padlock | try 111B |
| S.A.F.E. | padlock | 1092, 1145, 1001EH |
| Safe | SF10, 1049D, 1049E | |
| Safe-T-Check | X1054K | |
| Sager | 1047, 1047CR, C999 | |
| Samsonite | See Blue Dog luggage brochure | |
| Sanyo | cash register | 1069FL |
| Schroeder Thompson | O1122, ES8M, L1054B, 759ST | |
| Scorpion | boat | O1122, O1122A, 1040A, 1096EN |
| Seabrine | boat | CH4 |
| Sears | freezer | 1069N |
| Security | safe locks | SY9, SC1098X, O1122B, SC1176 |
| Security | mail box | 1559 |
| Selby | O1122A | |
| Sentry | safe door | 6K11, 1573A (shorten blade to .575) |
| Shasta | RV | O1122, 1000V |
| Shaw Walker | 1568, 1534 | |
| Shibaura | tractor | 1570 |
| Shur-Lock | CB radio | 1000 |
| Sidewinder | boat | 1098M |
| Signare | O1122 | |
| Simplex | Ilco Unican 1000 | 1054UN |
| Ski racks | Sears | 1041H |
| Ski Doo | 1098M, O1122, O1122A, 1098DB | |
| Skillman | R1001EN | |
| Slaymaker | See Ilco #60 | |
| Snap-On | tool boxes | 1527, 1527R, 1041TR |
| Snowmobiles | see brand names or: | 1041A, 1092V , 1092N, 1120D, O1122, X54 |
| Solon | S42 | |
| Southco | precut for RVs | BDK1, also see Blue Dog #75½ |
| Southern | desk | R1064E |
| Spair | Hong Kong | 1016 |
| Spartan | 1098M, 999, 1145, 997E | |
| Spartan | cash box | 1092B |
| Spice | 1043B | |
| Sport 20-SV | Sears | LF12 Silca |
| Square D | electric switch | O1122R |
| Squire | padlocks | MDK, Viro, Master |
| SS | brass padlock | 1092N |
| Stahl | toolbox | OKB120, shorten 1573A?, 1623 |
| Stanley | night latch | 1069N, O1122 |
| Stant | gas cap | 1098GX |
| Starcraft | RV | O1122A, O1122C, 1041G |
| Steelcase 'S100' | Office furniture | S1041JA |
| Steering wheel lock | Japan | K1122D |
| Storm King | O1122A | |
| Strattec | utility lock, toolboxes | 322861, OKB70 |
| Super Lock Products | 1011 | |
| Superior | Safes | BD551 |
| Superior Performance | wheel lock | CH4 |
| Switches | light switches | 1425, TS149, TS150, OKB71, OKB7, OKB15 |