CPVC Hexagon socket head screw
CPVC Hexagon socket head screw material is heat resistant, resistant to corrosion from acids, alkalis, salts, oxidants, etc. The maximum continuous use temperature can reach 90-100°C
M Size: M3-M12
peek plastic material: chlorinatedpolyvinylchloride (CPVC)
product type: Hexagon socket head bolt
color: Natural/Black/Other Colors(Customizable)
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CPVC Hexagon socket head screw Overview
CPVC (Chlorinated Polyvinyl Chloride) Hexagon Socket Head Screw is a type of plastic screw designed for applications requiring a combination of moderate mechanical strength, excellent chemical resistance, and electrical isolation. The Hexagon Socket drive allows for greater installation torque compared to slotted or Phillips drives, enabling a tighter, more secure assembly.
Overview and Design
| Feature | Detail | Purpose |
| Material | CPVC (Chlorinated Polyvinyl Chloride) | Offers good chemical resistance, particularly to acids and alkalis, and higher temperature tolerance than standard PVC. |
| Head Style | Socket Head (Cylindrical) | Features a tall, cylindrical head. This design maximizes the material volume in the head, providing the highest clamping force and sheer resistance possible for a CPVC screw. |
| Drive Style | Hexagon Socket (Allen Drive) | Allows for maximum torque transmission from the tool to the fastener, minimizing the risk of cam-out. |
| Application | Medium-stress structural fastening in chemical, electrical, and water treatment environments. | Used where a smooth, chemical-resistant body and a strong head are required. |
Product Parameters
CPVC Hexagon Socket Head Screws typically follow dimensional standards 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 |
Key Features
CPVC Hexagon Socket Head Screws are primarily chosen for their balance of performance and cost-effectiveness in corrosive environments:
Chemical Resistance: Excellent stability against most mineral acids, bases, and salts.
Best Mechanical Strength (for CPVC): The socket head design ensures the highest possible shear and tensile strength achievable with CPVC material.
Thermal Tolerance: Offers reliable performance at service temperatures higher than standard PVC.
Electrical Insulation: Inherently non-conductive, making it safe for electrical panel work.
Corrosion Immunity: Immune to rust and galvanic corrosion, a critical advantage over metal fasteners.
Applications
The CPVC Hexagon Socket Head Screw is a preferred plastic fastener for secure, medium-stress assemblies in environments where its specific material properties are critical.
Here is a brief overview of its primary usage scenarios:
Chemical Processing: Fastening pipes, flanges, and components in systems transporting acids, alkalis, and salts, due to excellent corrosion resistance.
Water Treatment: Securing filters, membranes, and pump components in purification and fluid handling systems.
Electrical Isolation: Used to mount components in junction boxes or on busbars where the fastener must be non-conductive for safety and function.
Moderate High-Temperature Service: Employed in environments where temperatures exceed the limit of standard PVC (up to approximately 90°C).
High-Torque Plastic Fastening: Utilized in assemblies requiring the highest clamping force achievable with a CPVC screw, thanks to the Hex Socket drive.
Advantages and Disadvantages
| Category | Advantage (Pro) | Disadvantage (Con) |
| Design | Hexagon Socket allows for the highest torque available for a CPVC screw. Cylindrical head offers maximum bearing surface and strength. | Requires an Allen (Hex) tool for installation, unlike common slotted/Phillips drives. |
| Performance | Excellent corrosion resistance and reliable performance in moderately high temperatures. | Low Mechanical Strength: Cannot withstand the high tensile or shear loads of metal screws. |
| Material | Cost-effective chemical resistance; Lightweight and non-contaminating. | Torque Limit: Over-tightening can easily strip the plastic threads. |
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.