The letter and number combinations can allow you to:

These blanks fit Weiser 5-pin cylinder locks using the WR5 keyway—not compatible with KW1 (Powerbolt 3) or other Weiser variants like WR3/WR4

1982 Mercury LN7

If you have replied positively to any of these questions

2''D x 111

1 1/4" Mortise Cylinder Corbin L4 (Satin Chrome) 2002-Infiniti-I30 & I35 The letter and number combinationsThe Corbin L4 Keyway 1 1 4" Mortise Cylinder in US26D, from GMS is crafted from solid brass and is compatible with the RU101 key. This cylinder is specifically designed to meet the exact pinning specifications of original Corbin systems. Each cylinder comes with 2 keys. This cylinder features a 6 pin, L4 core and comes keyed to the 6 pin, RU101 key. Comes with 2 keys Keyed in pairs Adams Rite and Yale Cam Cylinders use Corbin pins and the same spacing