n° 1100 Screw M18x50 UNI 5739 (DIN 933) material: STEEL GRADE L7 CF ASTM 320 M WITH A MINIMUM GUARANTEED CHARPY V NOTCH IMPACT VALUE OF 27J AT -50°C n° 1100 Washer M18 material: : STEEL CF ASTM F436 WITH A MINIMUM GUARANTEED CHARPY V NOTCH IMPACT VALUE OF 27J AT -50°C certificate 3.1 Delivery: 04/05/2016