Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 740-0072 found under Lens Spectacle Replacement by Eye Safety Systems Inc. The National Stock Number assigned to this part is 4240015254819, 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 740-0072.