Hex Half Thread High Strength Bolt, 8.8/10.9 Grade Black Oxide Hex Screw

Product Introduction

Hexagon half-thread high-strength bolt is a universal heavy-load fastener. It adopts integrated cold forging technology with uniform internal metal structure. The half-thread structure consists of smooth shank and complete thread, the shank can realize precise positioning during assembly, avoiding shaking after locking. After strict quenching and tempering heat treatment, the bolt meets national high-strength mechanical property standards, with strong bearing capacity under long-term heavy load. Blackening surface treatment forms a dense protective layer to prevent oxidation and rust in humid industrial environments.

Product Advantages

1. Multiple Strength Grades: 8.8 grade and 10.9 grade optional, meet different load demand.

2. Half Thread Optimized Structure: Smooth rod positioning, threaded section tight locking, high assembly stability.

3. Alloy Steel Heat Treatment: Excellent tensile and fatigue resistance, no loosening under long vibration.

4. Black Oxide Anti-Rust Coating: Uniform surface layer, low friction, long service life.

5. Complete Customization Service: Custom thread diameter, total length, shank length according to drawings.

Application Fields

- Steel structure engineering, building support, bridge connection fixing

- Automobile chassis, new energy vehicle frame, truck mechanical assembly

- Excavators, forklifts, agricultural machinery and other heavy engineering equipment

- Industrial equipment, generator sets, mold frames, large fixture fastening

Factory Strength

We are a professional manufacturer of high-strength standard and non-standard fasteners with 20 years of production experience. The factory is equipped with automatic cold forging production lines, professional heat treatment workshops and full sets of precision testing instruments. We accept small-batch sample customization and large-scale bulk orders. All finished bolts will pass hardness, tensile force and surface defect inspection before delivery, with stable delivery cycle and competitive factory direct sales price.