Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HL219-10-21 found under Pin Rivet by Hi Shear Corporation. The National Stock Number assigned to this part is 5320003030940, and the Federal Supply Class is 5320 Rivets. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HL219-10-21.