Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3 8-16X1.75LG-HHCS-DH found under Screwcaphexagon Head by R Cushman And Associatesinc. The National Stock Number assigned to this part is 5305016808655, 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 3 8-16X1.75LG-HHCS-DH.