November 17, 2020
Amstep Model 504A, 4 inch wide flat strip with bevel at back edge. Tread 9/32 inch thick, no-trip bevels at back edge, holes drilled and countersunk. The abrasive filler shall consist of a mixture of aluminum oxide and silicon gr…
Amstep Model 504A, 4 inch wide flat strip with bevel at back edge. Tread 9/32 inch thick, no-trip bevels at back edge, holes drilled and countersunk. The abrasive filler shall consist of a mixture of aluminum oxide and silicon gr…