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Contact SupplierWe can provide carriage bolts mushroom head square neck bolts as per following parameters:
sizes: m6 to m24
grade: 4.6, 4.8, 5.6, 8.8, 10.9
finish: auto black, hdg, zinc plated, ptfe, teflon, xylon, cadmium, dichromate, rilson etc. Standards: din-603 is:2609 iso-8677 bs-4933.