Why This Finish Is Used
Functional dark finishUseful with oil or post-treatmentCommon on selected steel fasteners
Surface Treatment
Phosphate Coating
Phosphate Coating can be selected according to corrosion resistance, strength requirement, appearance, assembly fit, and customer standards.Finish Overview
Phosphate coating is used on steel fasteners and hardware where a dark functional finish, oil retention, or additional coating preparation is needed.
Surface treatment should be selected together with the base material, service environment, appearance target, corrosion resistance, and assembly requirement.
Discuss Finish OptionsFinish Review Checklist
Base materialCoating thicknessSalt spray targetColor / appearanceThread fitPackaging
Typical Product Uses
BoltsNutsWashersThreaded parts
Selection Points
Indoor vs outdoor useOil protectionAppearance targetThread fit
Product types
Product Types With Phosphate Coating
Browse related product types under the same family and select the option closest to your drawing, assembly, or sourcing requirement.
Construction FastenersPlate Washers and Custom Stamped Washers SupplierPlate washers, square washers, flat washers and custom stamped washers for anchor bolts, steel structure and installation hardware.
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Suitable materials
Carbon SteelCost-effective strength for anchor bolts, plate washers, stamped brackets, mounting plates, and general construction hardware.Stainless SteelCorrosion resistance and stable strength for stainless bolts, nuts, washers, brackets, clamps, plates, and outdoor installation hardware.Alloy SteelHigh strength material option for fasteners and structural metal components.AluminumLightweight option for formed brackets, covers, plates, clamps, and selected non-structural installation hardware.Spring SteelElastic strength for spring washers, retaining clips, clamp parts, and selected hardware that needs recovery after loading.Specialty AlloysProject-specific grades for special corrosion, strength, temperature, or installation requirements confirmed by drawing.
Engineering RFQ