Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TR1712A-CPZ found under Parts Kit Lavatory by Brass Craft Mfg Co. The National Stock Number assigned to this part is 4510001023018, 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 TR1712A-CPZ.