UJ bolts nuts Type:UJ-1880 to UJ-2280 standard:GB screw tolerence:6G product grade:A Application:broad Material:carbon steel Q235 finish:zinc produce according to customers'drawing and requirement samples available package cartons & pallets according to customers' requirement U bolts Type:M8-M20 standard:GB screw tolerence:4h Application:broad Material:carbon steel grade 4.8 finish:zinc product grade:A produce according to customers'drawing and requirement samples available package cartons & pallets according to customers' requirement