Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U40-3.250SH found under Coupling Clamp Groo by V I J Corporation. The National Stock Number assigned to this part is 5342008192318, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like U40-3.250SH.