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ALLEN HEAD WOOD SCREWS

Parameter Category	Description
Material	Carbon steel , stainless steel (304/316 for outdoor/humid environments), brass
Surface Treatment	Zinc plating hot-dip galvanizing , stainless steel passivation, brass electroplating
Standard Specifications	Complies with DIN 571, ISO 14586, ANSI B18.6.3
Thread Specifications	Coarse wood screw thread; Diameter: metric (M3–M12), imperial (#4–#14); Length: 16mm–200mm; Countersunk/pan head options

Overview
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Structural Features
Features a hexagonal outer body with internal threads matching wheel studs. It typically has a tapered (conical) or spherical seat for precise wheel centering. Heavy-duty versions often include an integrated flange to increase the bearing surface.

Performance Advantages
Provides high clamping force to resist loosening from vibration and centrifugal force. The specialized seat ensures self-centering to prevent misalignment. Made with corrosion-resistant materials and surface treatments for a long service life and reliable safety.

Application Scenarios
A critical safety fastener used on all wheeled vehicles, including passenger cars, trucks, and trailers, to ensure secure wheel attachment.