3,700 cast aluminum stair treads, with anti-slip surface, #20 grain virgin aluminum oxide (al203) abrasive granuales cast into wearing surface. Alloy to be 535.2 or 443. Size: 3/8" thick X 11" wide, back of nose (total width 11-3/4") X 64" length. Two holes (5/16" countersunk) 3" from both side edges of the tread and then every 14-1/2". Holes to be drilled 2" from the square back edge and 2-3/4" from the front edge (nose capping).
Buy cast aluminum stair tread [USA]
