STUDBOLT, M18 DIA X 80MM LONG, FULLY THREADED, C/W 2 HEAVY HEXAGON NUTS, STUDBOLTS ASTM A193 GRADE B7 NUTS ASTM A194 GRADE 2H BOTH ITEMS TO BE ZINC PLATED/BICHROMATE TREATED, ISO METRIC COARSE THREADS QTY: 20 pcs. GASKET, 4 IN, 3MM THICK, CLASS 150, MATERIAL: NEOPRENE FLAT, SHORE A HARDNESS 60-70 MAXIMUM, TO BE PROVIDED WITH MATERIAL CERTIFICATE TO BS EN10204-2.2 ACCORDING TO GS EP PVV147 QTY: 4 pcs.