Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T-4911-KC135 found under Compensator Liquid Quantity Gage by Avi Systems Inc. The National Stock Number assigned to this part is 6680005267250, 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 T-4911-KC135.