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

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

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

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

Drywall Screw、Chipboard Screw、 Self Drilling Screw、Hex Head Self Drilling Screw、Self Tapping Screw、 410SS Self Drilling Screw

NYLOK 、Precote 、Loctite、Nycote、SilcoSeal、TSLG

High speed slf-drilling screw machine,cold heading mold,self-drilling screw point forming machine

Metallographic testing equipment and consumables