Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number YSW016-004 found under Screw Machine by Hypertronics Corporation. The National Stock Number assigned to this part is 5305013359328, 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 YSW016-004.