Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1315-4T4L found under File Visible Index Book Unit by Kwik File Storage Systems Llc. The National Stock Number assigned to this part is 7460000828535, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1315-4T4L.