Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8-1-1-4 found under Tie Down Trailer Th by Celtech Corporation. The National Stock Number assigned to this part is 4920004750766, 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 8-1-1-4.