Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7-3822 ITEM 21 found under Plug Vent by Tactair Fluid Controls Inc. The National Stock Number assigned to this part is 5340013498120, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7-3822 ITEM 21.