Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 44AP6D W COUPLING(6FT6IN found under Hose Assembly Nonmetallic by Guardian Filter Co. The National Stock Number assigned to this part is 4720014859915, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 44AP6D W COUPLING(6FT6IN.