Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BSL 1LS1 4C found under Switch Sensitive by British Sarozal Ltd. The National Stock Number assigned to this part is 5930012873722, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BSL 1LS1 4C.