Flat Disc-Shaped Pan Head Hexagon Socket Screws

Product introduction

Pan head hexagon socket screws have a flat disk-shaped head and a hexagonal drive design. They are both beautiful and have high torque transmission capabilities. They are suitable for precision machinery, electronic equipment, automotive parts and other fields. The pan head structure provides a large bearing surface, and the internal hexagonal drive effectively prevents teeth from slipping, making it suitable for high locking torque scenarios.

In practical applications, it is difficult for standard specifications to fully match diverse assembly requirements, so a large number of non-standard screws are used for special adaptation. For special structural requirements, we can develop special-shaped screws, such as flange structures, guide heads, assemblies, etc. As customized non-standard screws, we support full-process customization of head size, thread specification, length and drive form, provide one-stop service from sample development to batch delivery, and ensure product reliability through the IATF 16949 quality system.

 

Product design and features

Pan-head shape: The head height is moderate and the appearance is smooth and beautiful. It is suitable for occasions where the surface needs to maintain a low profile or has decorative requirements.

Inner hexagonal drive: The hexagonal hole design enables a large contact area between the wrench and the screw and high torque transmission efficiency, making it suitable for high locking torque scenarios.

Optional countersunk head angle: Some specifications can be used with countersunk holes to achieve the head being flush with or slightly higher than the mounting surface.

Optional anti-loosening design: can be equipped with pre-coated glue, nylon anti-loosening rings and other anti-loosening structures

As a common but highly customizable product, pan head hexagon socket screws, in addition to standardization, appear in a large number of non-standard screws to meet diverse assembly needs. It can also become an important part of specially shaped screws for scenarios that require special head shapes, odd-shaped drives or unconventional sizes.

 

Materials and application areas

Carbon steel: Strength grade can reach 10.9 and 12.9, suitable for high-strength connections

Stainless steel: SUS304, SUS316, etc., suitable for corrosion-resistant and high-cleanliness scenarios

Alloy steel: such as SCM435, which has excellent strength after heat treatment

Surface treatment: galvanizing, nickel plating, Dacromet, blackening, phosphating, etc., to meet the requirements of different anti-corrosion levels

 

Application areas:

Precision machinery and automation equipment: used for guide rail fixing, module connection, and motor assembly

Electronic and communication equipment: suitable for chassis assembly, radiator fixing, and PCB board support

Auto parts: used for interior parts, control modules, sensor fixing, etc.

Medical devices and instruments: Stainless steel materials meet cleanliness and corrosion resistance requirements

Molds and fixtures: high strength level to meet frequent disassembly and assembly requirements

In actual applications, due to differences in equipment structure, installation space, and appearance requirements, standard specifications are often difficult to completely match, so a large number of non-standard screws are used for special adaptation. For special structural requirements, special-shaped screws can also be developed, such as pan head with flange, pan head with guide structure, pan head assembly, etc.

 

Quality control and certification system

Raw material control: 100% batch re-inspection to ensure that chemical composition and mechanical properties meet standards

Process control:

Cold heading molding: Dimensional SPC monitoring to ensure head shape and hexagonal hole accuracy

Thread forming: Thread rolling process, 100% online inspection of thread pass and stop gauges

Heat treatment: continuous furnace production, real-time recording of temperature curve and hardness distribution

Surface treatment: salt spray test, hydrogen embrittlement test, coating adhesion test

 

Finished product testing:

Full size inspection: 100% optical screening of key dimensions

Mechanical properties: hardness, tensile strength, guaranteed load test

Torque test: breaking torque, locking torque verification

 

Certification system

ISO 9001, IATF 16949 (automotive industry quality management system)

Products meet RoHS and REACH environmental protection requirements

PPAP (Production Part Approval Process) level three document package available

For non-standard screws and screws with special shapes, we have established a special quality control process, from mold verification, first article confirmation to process capability analysis, to ensure that each customized non-standard screw maintains a stable quality level while increasing its structural complexity.

 

Customized services

Customized head structure: The diameter and height of the pan head can be adjusted according to the installation space and load-bearing requirements.

Add flange structure, replace gasket, improve bearing surface and anti-loosening effect

Design screw structures with special shapes such as guide heads, positioning bumps, etc.

Customized drive form: the inner hexagonal size can be adjusted non-standardly

Can be combined into multiple drive forms such as hexagon socket + cross groove, hexagon socket + plum blossom groove, etc.

Size and thread customization: Thread specifications: metric, imperial, American and non-standard threads

Length range: 2mm – 300mm, accurate to 0.1mm level

Rod structure: full thread, partial thread, stepped rod, reduced rod, etc.

Functional integration: pre-coated anti-loosening glue (nylon, chemical glue) assembly design: integrated screws + flat washers + elastic washers

Sealing function: with O-ring groove or pre-coated sealant

Development mode: Supports customized drawings, reverse engineering, and joint design. Sample cycle: 5–10 days, mass production cycle: 15–25 days

 

FAQ

Q: What are the advantages of pan head hexagon socket screws compared with ordinary pan head Phillips screws?

A: The internal hexagonal drive method has a greater torque bearing capacity than the cross recessed drive and is less likely to slip. It is suitable for occasions that require higher locking torque. At the same time, the pan head structure provides a larger bearing surface and is suitable for connecting thin-walled parts or soft materials.

 

Q: Can you provide non-standard pan head hexagon socket screws?

A: Yes. One of our core competencies is the provision of non-standard screws. Whether it is thread specifications, head size, length requirements, or drive form, all can be customized according to customer needs.

 

Q: How to ensure the quality stability of customized non-standard screws?

A: For customized non-standard screws, we intervene from the mold design stage, optimize the molding process through CAE analysis, conduct strict first article approval (FAI) before mass production, and implement SPC monitoring during mass production to ensure that the process capability index Cpk ≥ 1.33.

 

Q: What is the minimum order quantity?

A: There is no minimum order quantity limit for standard products; for non-standard screws and screws with special shapes, the customized minimum order quantity is generally 5,000-10,000 pieces, depending on the product complexity, process requirements and degree of raw material customization.

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