Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PD33-28 found under Fastener Set Hinge by Portec Inc. The National Stock Number assigned to this part is 3910000970730, and the Federal Supply Class is 3910 Conveyors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PD33-28.