Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3072Y found under Block Wd12in Snatch by Brewer Titchner Corp. The National Stock Number assigned to this part is 3940000030706, 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 3072Y.