Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS91528-1T1B found under Knob by De Marzi Victor. The National Stock Number assigned to this part is 5355004729597, 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 MS91528-1T1B.