Question: I have a JMA blank stamped HRD-2D, what other blank could I use?
Answer: That is a six wafer blank. The Ilco equivalent is 1536, the Silca equivalent is HRD1R. The five wafer blank is JMA HRD-1D, and the Ilco is 1574. This is sometimes the blank to use if the code on the lock or the key is CH751.
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