Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M19-20873 PC NO 23 found under Screw Machine by Parker Hannifin Ltd. The National Stock Number assigned to this part is 5305014676680, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M19-20873 PC NO 23.