Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SRB52A found under Knob by Bi Technologies Corporation. The National Stock Number assigned to this part is 5355004686995, 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 SRB52A.