Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 301309 ITEM NO 17 P N 300156 1 found under Ring Retaining by Tri Tec Manufacturing Llc. The National Stock Number assigned to this part is 5325016339382, 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 301309 ITEM NO 17 P N 300156 1.