Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8F6218 found under Bolt Pressure Sprin by Caterpillar Inc. The National Stock Number assigned to this part is 5306004266333, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 8F6218.