Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3337 found under Fork Assembly Maste by Jacobs Mfg Co The. The National Stock Number assigned to this part is 2990011573756, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3337.