PFA Hexagon head bolt
PFA Hexagon head bolt is known as the “King of Plastics”. It is corrosion-resistant and electrically insulating. It is not affected by temperature and can be used for a long time at -80~260℃.
M Size: M4-M10
peek plastic material:Polyvinylidenefluoride(PFA)
product type: Hexagon head bolt
Finish: Natural/Black/Other Colors(Customizable)
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PFA Hexagon head bolt Overview
PFA (Perfluoroalkoxy Alkane) Hexagon Head Bolt is a critical, ultra-high-performance plastic bolt utilized in industrial applications demanding maximum chemical resistance and extreme thermal stability. Featuring the traditional hexagonal head, which is externally driven with a wrench, this bolt provides the highest chemical and heat immunity available in a structurally stable polymer fastener.
I. Overview and Design
| Feature | Detail | Purpose |
| Material (PFA) | Perfluoroalkoxy Alkane. A high-purity fluoropolymer with extreme chemical and thermal stability. | Ensures the joint is completely immune to corrosion and chemical attack across a wide temperature range. |
| Design (Hexagon Head) | Standard six-sided head, designed for high torque transfer using wrenches (spanners). | Allows for maximum tightening force achievable with PFA, providing secure, reliable assembly. |
| Application | Through-hole fastening (requires a corresponding PFA nut and washer) or threading into a tapped hole. | Ideal for demanding fluid handling and chemical equipment where metal must be avoided. |
Product Parameters
PFA Hexagon Head Bolts adhere to established international standards, typically ISO 4014 (partially threaded) or ISO 4017 (fully threaded), ensuring compatibility with standard metric tools and components.
| Nominal Diameter (d) | Thread Pitch (P) | Across Flats (s) | Head Height (k) |
| M4 | 0.7 mm | 7.0 mm | 2.8 mm |
| M6 | 1.0 mm | 10.0 mm | 4.0 mm |
| M8 | 1.25 mm | 13.0 mm | 5.3 mm |
| M10 | 1.5 mm | 16.0 mm | 6.4 mm |
| M12 | 1.75 mm | 18.0 mm | 7.5 mm |
| M16 | 2.0 mm | 24.0 mm | 10.0 mm |
Key Features
PFA Hexagon Head Bolts are selected for their superior performance in critical environmental stress conditions:
Extreme Chemical Resistance: Unaffected by virtually all industrial chemicals, solvents, and concentrated acids up to its maximum service temperature.
Thermal Stability: Maintains integrity and chemical resistance from cryogenic lows up to approximately $260^\circ \text{C}$ ($500^\circ \text{F}$).
Corrosion & Galvanic Immunity: Eliminates the risk of rust, corrosion, or galvanic interaction when used near metal components.
Ultra-High Purity: Non-leaching and non-contaminating, essential for UPW and pharmaceutical systems.
Non-Conductive & Non-Magnetic: Provides crucial electrical isolation for sensitive equipment.
Advantages and Disadvantages
| Category | Advantage (Pro) | Disadvantage (Con) |
| Performance | Unmatched Chemical and Thermal Resistance. Excellent seal maintenance in corrosive media. Zero contamination. | Low Mechanical Strength: Cannot withstand the high tensile/clamping forces of structural metal bolts. |
| Material | Non-corrosive, Non-magnetic, Excellent Insulator. | Cold Flow (Creep): PFA is prone to deforming permanently under sustained, high compressive pressure, potentially leading to joint loosening. |
| Cost | Provides the highest level of purity and resistance available in a fastener. | Very High Cost due to specialized material and complex manufacturing processes. |
Applications
PFA Hexagon Head Bolts are essential in the most demanding, mission-critical environments:
Semiconductor Manufacturing: Used for securing high-purity piping, fixtures, and assemblies in wet etching and chemical delivery systems to prevent metallic ion contamination.
Chemical Processing: Fastening flanges, valves, and pump components exposed to aggressive, hot processing fluids and concentrated chemicals.
High-Temperature Equipment: Securing components in ovens, sterilizers, and processing equipment operating at elevated temperatures.
Laboratory & Analytical Equipment: Used in reactors and instrumentation requiring total chemical inertness and non-magnetic 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.