Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40-12117TW found under Screw Machine by Vaisala Meteorological Systems Inc. The National Stock Number assigned to this part is 5305013085138, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 40-12117TW.