Cap Nut

The ZINC PLATED HEX DOMED CAP NUT is an integrated protective decorative fastener composed of hexagonal wrench base and seamless hemispherical dome top. It fully wraps exposed bolt thread ends to eliminate sharp edges, providing both reliable clamping force and neat finished appearance for assembly workpieces.

Made of high-quality Grade 4.8 carbon steel, this acorn nut has stable tensile strength to satisfy medium-load fastening requirements. The surface adopts bright blue white zinc electroplating treatment, forming a compact glossy anti-corrosion zinc film that isolates moisture and air oxidation, effectively extending service life under indoor and mildly humid working environments.

The standard six-sided outer profile matches common spanners and socket tools for fast torque-controlled installation. The one-piece smooth dome cap completely covers bolt tips, preventing scratch damage to operators and finished surfaces, while blocking dust and corrosive medium from invading internal threads to avoid thread rust and jamming. Precisely tapped internal threads fit standard metric bolts tightly, supporting repeated disassembly and maintenance cycles.

Zinc plated hex domed cap nuts are widely applied to furniture decorative connection, electrical cabinet assembly, automotive interior trim fixing, precision instrument casing fastening and general mechanical equipment assembly. Its combination of protective, anti-rust and decorative features makes it a universal finishing fastener for finished-surface assembly projects.

We provide full OEM and ODM custom manufacturing services and support tailor-made production based on customer technical drawings, physical samples and special specification demands. Custom thread sizes, dome height, wall thickness, plating thickness and personalized export packaging options are available to meet furniture, automotive and electrical engineering project requirements. Private laser marking and custom brand printing services are also supported for hardware distributors, furniture manufacturers and auto parts suppliers.

Each ZINC PLATED HEX DOMED CAP NUT is produced under strict fastener quality control standards. All finished nuts pass comprehensive dimensional inspection, thread precision test, dome seamless forming sampling test and surface zinc coating uniformity check before shipment, to guarantee accurate thread tolerance, smooth scratch-free dome surface and consistent anti-corrosion plating for every production batch.