Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 852-SS-20 found under Screw Panel Fastener by New Haven Mfg Corp. The National Stock Number assigned to this part is 5305013485763, 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 852-SS-20.