Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AD121-0052-0020 found under Eyelet Metallic by Trevose Industrial Products Inc. The National Stock Number assigned to this part is 5325008136947, 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 AD121-0052-0020.