Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99253 found under Insulation Thermal Special Purpose by Hamilton Sundstrand Corporation. The National Stock Number assigned to this part is 1560013367959, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 99253.