Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WD6003 found under Base A Frame Spec by Patriot 3 Inc. The National Stock Number assigned to this part is 3940015940647, and the Federal Supply Class is 3940 Blocks Tackle Rigging And Slings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WD6003.