Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9940.0004 found under Cap Snap Fastener by Hannay Reels Inc. The National Stock Number assigned to this part is 5325015936438, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9940.0004.