Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28849JB found under Ring Fastener Spec by Stanadyne Corporation. The National Stock Number assigned to this part is 5325015965913, 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 28849JB.