Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HT42UA25 found under Screw Close Tolerance by Hi Shear Corporation. The National Stock Number assigned to this part is 5305002925487, 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 HT42UA25.