Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D1 1231 found under Latch Set Mortise by Diamond Sea Glaze Mfg. The National Stock Number assigned to this part is 5340016672539, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D1 1231.