Since 1976 Hong Ying Screws established production of specialized high-tensile strength inner hexagon screws, alloy steel, stainless steel, special screws for cold-formed auto machines, and one mold formed machine products in accordance with Din 906, 912...
Main Products:
alloy steel hexagon socket head cap screws, socket set screw cup point socket flag countersunk head screws, button screws, shoulder screws pipe plug...etc, hex socket cap screws...
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