Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-40X0.188PNH T9 TORX DR found under Screw Assembled Washer by Elco Industries Inc. The National Stock Number assigned to this part is 5305012713256, 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 4-40X0.188PNH T9 TORX DR.