Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST50-F-B ITEM N0 9 found under Standoff Hinged Thr by Mechanical Marine Div Hayward Mfg. The National Stock Number assigned to this part is 5340013827051, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ST50-F-B ITEM N0 9.