Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3037-1390 found under Shaft Shouldered by Parsons Ralph M Co. The National Stock Number assigned to this part is 3040010061329, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3037-1390.