I know that KD refers to Keyed Different, but sometimes for the same model I’ll see an entry for D and KD. For example, Master Lock has 7040KD and 7040D. What’s the difference between D and KD in part numbers? Are they the same?
They are different. The D in 7040D, for example, stands for the type of packaging being used. In this case it would be a Vis Packaging for retail sales display. A 7040DKA would be a Vis Package Keyed Alike. If there is nothing after the D, then it would designate keyed different. Normally, if there is nothing after the part number, 7040 would designate a box pack, and then KA, KD, or WO (without cylinder).
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