PTFE Hexagon socket head screw
PTFE Hexagon socket head screw has excellent chemical stability, corrosion resistance, heat resistance and cold resistance, flame retardant grade UL94 V-0, and can be used for a long time at -190~260℃.
M Size: M3-M12
peek plastic material: Polytetra fluoroe thylene（PTFE ）
product Type: Hexagon socket head bolt
Finish: Natural/Black/Other Colors(Customizable)
Search
Product type
Get A Quote
PTFE Hexagon socket head screw Overview
PTFE (Polytetrafluoroethylene, or Teflon) Hexagon Socket Head Screw is a premium, high-performance fluoropolymer fastener that combines exceptional chemical inertness and wide temperature stability with a drive system optimized for the material’s properties. The Hexagon Socket (Allen drive) allows for the most controlled tightening possible, essential for working with the soft nature of PTFE, while the cylindrical head provides a good bearing surface.
I. Overview and Design
| Feature | Detail | Purpose |
| Material (PTFE) | Polytetrafluoroethylene. A high-performance fluoropolymer with the lowest coefficient of friction and highest chemical inertness of all plastics. | Provides a fastener that is virtually impervious to all industrial chemicals and functions across an extremely wide temperature range. |
| Head Style (Cylindrical Socket Head) | A tall, cylindrical head with a flat top. | Provides a large bearing surface and maximum shear resistance achievable with soft PTFE. |
| Drive Style (Hexagon Socket) | The Allen drive recess. | Allows for the most controlled, gentle torque application, minimizing the risk of thread stripping or drive damage during installation. |
Product Parameters
PTFE Hexagon Socket Head Screws typically follow metric standards for socket head cap screws, such as ISO 4762 (equivalent to DIN 912).
| Nominal Diameter (d) | Thread Pitch (P) | Head Diameter (D) | Head Height (K) | Socket Size (S) |
| M4 | 0.7 mm | 7.0 mm | 4.0 mm | 3.0 mm |
| M5 | 0.8 mm | 8.5 mm | 5.0 mm | 4.0 mm |
| M6 | 1.0 mm | 10.0 mm | 6.0 mm | 5.0 mm |
| M8 | 1.25 mm | 13.0 mm | 8.0 mm | 6.0 mm |
| M10 | 1.5 mm | 16.0 mm | 10.0 mm | 8.0 mm |
| M12 | 1.75 mm | 18.0 mm | 12.0 mm | 10.0 mm |
Key Features
PTFE fasteners are defined by their extreme chemical and thermal performance, with the socket head providing a key functional advantage:
Universal Chemical Inertness: Unaffected by virtually all industrial chemicals, solvents, and corrosive agents.
Extreme Temperature Range: Operates reliably from approximately 200°C to 260°C.
Controlled Torque: The Hex Socket drive prevents slippage (cam-out) and allows the installer to precisely apply the very low torque required to avoid stripping PTFE threads.
High Purity: Does not leach contaminants, vital for pharmaceutical and ultra-pure processes.
Non-Conductive: Excellent dielectric strength, offering superior electrical insulation.
Advantages and Disadvantages and Usage Scenarios
| Category | Advantage (Pro) | Disadvantage (Con) | Usage Scenarios |
| Performance | Highest chemical and temperature resistance of all plastics. Excellent non-stick and non-contaminating properties. | Low Mechanical Strength: Very soft with high cold flow (creep), leading to joint relaxation over time. | Chemical Reactors/Piping: Securing internal components exposed to highly aggressive media and high temperatures. |
| Design | Socket drive allows for controlled, gentle torque and compact assembly with a strong head for shear forces. | Torque Restriction: Must be installed with very low, controlled torque to prevent thread stripping. | Cryogenic/High-Heat Equipment: Structural fastening in systems operating at temperature extremes (e.g., $-150°C or 250°C). |
| Environmental | Non-corrosive, non-magnetic, and UV resistant. Ideal for ultra-high purity systems. | High Cost: The most expensive common polymer fastener material. | Pharmaceutical/Semiconductor: Non-contaminating assemblies where steam sterilization or harsh cleaning agents are used. |
Key Polytetrafluoroethylene (PTFE) Properties
Packaging & Delivery
Standard packaging includes PE bag, foam cover, and one double-deck corrugated outer carton for safety during transit. Delivery time is 5-15 working days depending on the quantity.