Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 37-3 AND 37-8 found under Key Feather And Gea by Lodge And Shipley Manuflux. The National Stock Number assigned to this part is 5315011906461, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 37-3 AND 37-8.