Fastener 1.Material:Cast iron,carbon steel 2.Weight:0.05 ... .Certificate: ISO9001 Construction Fastener 1. Material: Gray iron & ductile iron & malleable iron according to ASTM, DIN,JIS, EN, ISO, ... , machinery,etc.6. Certificate: ISO90017. Engineering service: OEM and ODM can be provided. All of our products are ... you with excellent quality, competitive price and on-time delivery. Cast iron Fastener