Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4053 found under Sight Gauge Aircraf by Gits Mfg Co Inc. The National Stock Number assigned to this part is 1680015840439, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4053.