Bolt Assembly, For Slot Width 0.4 in, Steel, Zinc-Plated, Fastener Thread Size 5/16 In. -18, Fastener Thread Length 11/16 in, T-Nut, Flanged Button Head Socket Cap, Threaded Hole Location Single Offset, Roll-In, Inch, Compatible Brand and Series 80/20, 15 Series, Compatible Manufacturer Model Number 1515, 1530, 15 Series