Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 30031-1 PC 51 found under Locking Assembly by Biach Industries Inc. The National Stock Number assigned to this part is 4470012168855, 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 30031-1 PC 51.