NF E25-800-1:1994 Fasteners. Bolts for corrugated steel pipes. Part 1 : hexagon head screws with or without flange, with or without nibs. Product grade A.
1994NF E25-800-1:1994 Fasteners. Bolts for corrugated steel pipes. Part 1 : hexagon head screws with or without flange, with or without nibs. Product grade A.