Fastener 1.Material:Cast iron,carbon steel 2.Weight:0.05 to 2kgs 3. ... other 4.Certificate: ISO9001 Construction Fastener 1. Material: Gray iron & ductile iron & malleable iron according to ASTM, DIN,JIS, EN, ISO, GB standards ... According to customers' requirements, such as oil dipping, plating,black oxide treatment5. Application: Construction/building industry, machinery,etc.6. Certificate: ISO90017 ...