Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KS500B found under Cap Fixed Tant by Alco Industries Inc. The National Stock Number assigned to this part is 5355004647489, and the Federal Supply Class is 5355 Knobs And Pointers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KS500B.