Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST5M1253-302A found under Knob by Monogram Aerospace Fasteners Inc. The National Stock Number assigned to this part is 5355003214678, 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 ST5M1253-302A.