Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 391-1261 found under Shield Protective Vehicular by Caterpillar Inc. The National Stock Number assigned to this part is 2590016683952, and the Federal Supply Class is 2590 Miscellaneous Vehicular Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 391-1261.