Bolt Assembly For Slot Width 0.3 in Steel Zinc-Plated Fastener Thread Size 1/4 in -20 Fastener Thread Length 1/2 in T-Nut Flanged Button Head Socket Cap Threaded Hole Location Double Slide-In Inch Compatible Brand and Series 80/20 10 Series Compatible Manufacturer Model Number 1010 1020 10 Series Package Quantity 6