Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AB-12128RB found under Junction Box by Austin Co Inc The. The National Stock Number assigned to this part is 5975013038251, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AB-12128RB.