Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CH4 4S found under Holder Semiconductor Device by Chromalloy American Corp. The National Stock Number assigned to this part is 5961009863163, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CH4 4S.