Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DH2-638 found under Connecting Piston by Brooks T J Co. The National Stock Number assigned to this part is 3040014396203, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DH2-638.