Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AP50C16 found under Copper Washer 16 A by Hydraulics International Inc. The National Stock Number assigned to this part is 5310015072852, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AP50C16.