Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R21C6 found under Control Assembly Push Pull by Buyers Products Company. The National Stock Number assigned to this part is 2590013285661, and the Federal Supply Class is 2590 Miscellaneous Vehicular Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R21C6.