Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 872-131 found under Brick Refractory Special Shape by Aqua Chem Inc. The National Stock Number assigned to this part is 9350002169191, and the Federal Supply Class is 9350 Refractors And Fire Surfacing Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 872-131.