Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31C59 found under Guide Adjusting Spr by Grimes Aerospace Company. The National Stock Number assigned to this part is 1660007888148, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 31C59.