Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 520-02-09LBC found under Filter Unit Gas Particulate by Racal Health And Safety Inc. The National Stock Number assigned to this part is 4240014286671, and the Federal Supply Class is 4240 Safety And Rescue Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 520-02-09LBC.