Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18428 11 found under Ring Retaining by Level 10 Industries Inc. The National Stock Number assigned to this part is 5325011412023, 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 18428 11.