PP Hexagon head bolt
PP Hexagon head bolt has a specific gravity of 0.9, which is the lightest among plastics; it has excellent mechanical properties, good chemical stability; excellent electrical properties, and is resistant to high-frequency electrical insulation.
M Size: M3-M8
peek plastic material: PP Polypropylene
product type: Hexagon head bolt
color: Natural/Black/Other Colors(Customizable)
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PP Hexagon head bolt Overview
PP (Polypropylene) Hexagon Head Bolt is an economical and highly versatile plastic bolt primarily selected for its exceptional chemical resistance to a wide range of acids, bases, and organic solvents. The Hexagon Head design allows for external wrench tightening, enabling the best possible clamping force achievable with this material in low-stress, non-corrosive assemblies.
I. Overview and Design
| Feature | Detail | Purpose |
| Material (PP) | Polypropylene. A semicrystalline thermoplastic known for its rigidity, toughness, and excellent chemical resistance. | Provides a cost-effective fastener that is immune to rust, corrosion, and many aggressive chemicals. |
| Head Style (Hex Head) | Standard six-sided external head. | Allows for external wrench tightening, enabling the maximum controlled torque and clamping force achievable with PP. |
Product Parameters
PP Hexagon Head Bolts typically follow established metric standards for hexagon head bolts, such as ISO 4014 (partially threaded) or ISO 4017 (fully threaded).
| Nominal Diameter (d) | Thread Pitch (P) | Across Flats (s) | Head Height (k) |
| M5 | 0.8 mm | 8.0 mm | 3.5 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
Polypropylene fasteners are valued for their broad chemical resistance and cost efficiency:
Excellent Chemical Resistance: Superior resistance to a vast range of inorganic and organic chemicals, including many acids, alkalis, and solvents.
Corrosion Immunity: Completely eliminates the risk of rust and galvanic corrosion in wet or chemical atmospheres.
Cost-Effective: One of the most economical corrosion-resistant fasteners available, ideal for high-volume use.
Non-Conductive: Provides reliable electrical insulation.
Low Density: Extremely lightweight, beneficial for weight-sensitive applications.
Key Polypropylene (PP) Properties
Applications
PP Hexagon Head Bolts are commonly used in applications prioritizing chemical resistance and budget over high mechanical strength or high temperature:
Chemical Processing: Securing covers, supports, and fixtures in tanks, filters, and piping systems handling corrosive liquids at ambient temperatures.
Water Treatment: Fastening components in water purification, deionization, and pool systems where exposure to chemicals like chlorine is common.
Laboratory Equipment: Assembling non-critical fixtures, racks, and enclosures in damp or chemical lab environments.
Plumbing and HVAC: Used in ventilation and drainage systems where resistance to moisture and cleaning agents is required.
Advantages
| Category | Advantage (Pro) | Disadvantage (Con) |
| Performance | Superior chemical resistance to a broad range of substances. Highly economical. | Low Mechanical Strength: Cannot withstand high tensile or shear loads; easily stripped if over-torqued. |
| Material | Lightweight, non-contaminating, and non-corrosive. | Low Temperature Limit: Maximum continuous service temperature is typically low (80°C). |
| Design | Hex Head allows for controlled tightening. | Poor UV Resistance: Prone to degradation and becoming brittle when exposed to direct sunlight. |
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.