Continuous type radiance tempering (carburization)furnace complete production line, continuous type radiance furnace (heat treatment, anneal, hard soldering ,firing), crucible type ball furnace(electric heating, natural gas).

Trimming die. Thread rolling shutter .hexagon punch rod. grab mold

DIN/UNC/BSW nuts、bolts，Drywall screws，Chipboard screws， Self drilling screws，Wood screws，Drop in anchors，Wedgs anchors 3ps/4ps fix bolt, Sleeve anchors

heading machine,thread rolling machine.

571 hexagon wood screws, hexagon self-tapping screws, 6560 triangle screws, 818 round head Phillips screws, 819 countersunk screws, screws with washers, spherical cross screws, fiberboard nails

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

copper washer, ring, bronze washer,gasket