Hex Socket Combination Screw

Factory pre-assembled triple structure avoids manual gasket matching, greatly improving industrial assembly efficiency. With precise standard machine thread, smooth forming surface and stable anti-vibration performance, these hex combination screws are widely used for mechanical equipment, automotive parts, mold accessories, high-precision electrical products and structural fastening scenarios requiring high locking force.

High-Precision Cold Forging Craft & Secondary Thread Rolling Processing

This hex socket three-in-one screw is manufactured via integrated cold forging and precision thread rolling technology. The internal hex socket is integrally formed with high concentricity and standard groove size, perfectly matching standard Allen wrenches for uniform force transmission. The deepened socket design effectively prevents tool slipping and head damage during high-torque tightening. The screw body features dense metal fiber structure after heat treatment, delivering stable hardness and tensile strength without fracture or deformation under heavy load. The pre-assembled flat washer and spring washer adopt precision stamping and pressure-fitting technology, tightly fixed without falling off during transportation and installation. Multiple surface anti-corrosion treatments including zinc plating, color passivation and black oxidation ensure excellent rust resistance and long service life for indoor and light industrial working conditions.

Product Parameter

High-Torque Structural Strength & Precision Industrial Application Values

1. Superior high-torque locking performance. The internal hex socket drive can bear greater tightening torque than cross recess heads, realizing high-strength rigid locking. It is not easy to slip or damage the screw head during repeated disassembly and maintenance, perfectly adapting to high-precision mechanical assembly requirements.

2. Dual anti-vibration and anti-loosening protection. Equipped with matched flat washer and spring washer, the combination structure effectively buffers mechanical vibration and pressure changes during equipment operation. It eliminates thread loosening and displacement risks, maintaining long-term stable structural connection for operating equipment.

3. Integrated pre-assembled design improves efficiency. Factory one-piece assembly eliminates manual sorting and matching of scattered gaskets, solving the problems of gasket loss and mismatching. It greatly optimizes production line rhythm and reduces labor costs for batch industrial assembly.

4. High-precision thread matching & strong stability. Adopting secondary precision thread rolling process, the thread pitch and tooth shape are highly standardized with smooth meshing and accurate tolerance. It fits tightly with standard threaded holes without sliding teeth or jamming, ensuring assembly accuracy of precision equipment.

5. Durable structure & wide industrial compatibility. With high hardness, strong toughness and excellent anti-corrosion surface performance, the screw adapts to various indoor and light industrial environments. It is the preferred standard fastener for machinery, automobile, mold and electronic manufacturing industries with stable batch quality and cost-effective supply.

FAQ

Q1: What is the difference between hex socket combination screws and pan head combination screws? 

A1: Hex socket combination screws adopt internal Allen drive with higher torque resistance and stronger locking force, suitable for mechanical and high-precision equipment scenarios; pan head cross combination screws are more suitable for conventional electrical and light assembly fields with lower torque requirements.

Q2: Will the pre-assembled gaskets fall off during use? 

A2: All gaskets are fixed by professional high-pressure crimping process. They maintain tight fitting during long-distance transportation, screwing and vibration, no falling off or displacement, ensuring complete product consistency.

Q3: Is this screw suitable for high-strength mechanical fixing? 

A3: Yes. The hex socket structure provides excellent torque transmission effect, and the heat-treated screw body has high structural strength. It is widely used for mold, mechanical frame and automotive component fastening that requires high locking stability.

Q4: Can customized specifications and logo printing be provided? 

A4: We support full-scale customization including special screw lengths, non-standard thread sizes, exclusive surface colors and laser brand marking, meeting personalized OEM and project matching needs.

Q5: What surface anti-rust options are available? 

A5: Conventional electro galvanizing, color zinc passivation and black oxidation treatments are available. We can also provide enhanced anti-corrosion surface processes according to customer environmental usage requirements.