Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 421752 found under Muffler Exhaust by Clark Material Handling Co. The National Stock Number assigned to this part is 2990006099572, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 421752.