Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D56C ASTROGOGGLE found under Goggles Industrial by Sperian Eye And Face Protection Inc. The National Stock Number assigned to this part is 4240011321750, 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 D56C ASTROGOGGLE.