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Contact SupplierDIN EN ISO 4017-2001 is a hes head bolt standard for dimensions, more details to check below information. Half thread hex bolt standard is DIN EN ISO 4014. Bolts’ properties need to follow ISO 898-1. Anyang Longteng Heat Treatment Material Co.,Ltd produce ISO 4017, ISO 4014 with property class 8.8, 10.9, or customers’s target properties, product size range M20-M80. CE certificate available, EN14399, EN15048, EN1090.