Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 542 16 74-91 found under Screw Machine by Husqvarna Outdoor Products Inc. The National Stock Number assigned to this part is 5305015548153, 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 542 16 74-91.