Blackening Treatment for Stainless Steel and Copper Materials (Fasteners, Rigging, Castings, Precision Machined Parts): High surface hardness: 6H grade. Strong adhesion: 5A grade. Clean, oil-free, and environmentally friendly, compliant with EU RoHS (SGS report available upon request). Thin coating (3-8 μm), minimally impacting thread acceptance with go/no-go gauges. Resistant to acids, alkalis, and seawater corrosion, verified by corrosion tests. Heat-resistant up to 400°C without peeling. Effectively prevents thread locking and provides lubrication, with a friction coefficient between 0.19 and 0.25. Excellent salt spray resistance: starting from 120 hours, up to 300 hours, and can achieve 1000 hours. UV-resistant, colorfast, and aging-resistant. Consistent color across multiple production batches. Contact: 18661897293 / 18653205193

Taps,Drills,Endmills,Gauges,dies,Indexable

Metallographic testing equipment and consumables

Various metal hardness testers include Rockwell, Vickers, Brinell, metallographic sample preparation equipment including cutting machines, mounting machines and grinding and polishing machines, metallographic sample preparation consumables, microscopes and analysis software

Metal heat treatment furnaces

Drywall screw ，Chipboard Screw，Self Tapping Screw ，Self Drilling Screw ， Cement nail ，Wood Screws

CSK head self drilling screws, Truss head self drilling screws, Pan head self drilling screws, Drywall screws

Stainless steel self tapping screws, machine screws, hexagonal self tapping screws, aluminum alloy pendant, stainless steel back bolt, mechanical anchor bolt, wedge anchor bolt, wedge anchor, etc