Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 542 16 62-21 found under Meter Time Totalizing by Husqvarna Outdoor Products Inc. The National Stock Number assigned to this part is 6645015863434, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 542 16 62-21.