PVDF Slotted knurled screw
PVDF Slotted knurled screw is a polymer engineering plastic with excellent chemical and weather resistance, and excellent UV resistance and aging resistance.
M Size: M3-M8
peek plastic material: Polyvinylidene fluoride(PVDF)
Finish: Natural/Black/Other Colors(Customizable)
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PVDF Slotted knurled screw Overview
PVDF (Polyvinylidene Fluoride) Slotted Knurled Screw is a premium, high-performance fluoropolymer fastener that combines exceptional chemical resistance and high purity with a head designed for tool-free, manual adjustment. The knurled circumference allows for easy finger-tightening and quick release, making it ideal for access panels and non-critical adjustments in the most chemically aggressive or sensitive environments.
I. Overview and Design
| Feature | Detail | Purpose |
| Material (PVDF) | Polyvinylidene Fluoride. A high-performance fluoropolymer with high stiffness, abrasion resistance, and excellent resistance to UV, chemicals, and radiation. | Ensures chemical inertness, UV stability, and minimal contamination in highly critical systems. |
| Head Style (Knurled) | Features vertical or diagonal ridges around the circumference. | Enables quick, comfortable finger-tightening and adjustment without the need for tools. |
| Drive Style (Slotted) | Includes a single slot on the top surface. | Provides an optional means for tool-based securing or removal using a flat-blade screwdriver. |
Product Parameters
Below are representative dimensions for common PVDF Slotted Knurled Screws:
| Nominal Diameter (d) | Thread Pitch (P) | **Typical Head Diameter (D) ** | **Typical Head Height (K) ** | Common Lengths (L) |
| M4 | 0.7 mm | 10.0 mm | 7.0 mm | 8 mm to 30 mm |
| M5 | 0.8 mm | 12.0 mm | 8.0 mm | 10 mm to 40 mm |
| M6 | 1.0 mm | 14.0 mm | 9.0 mm | 12 mm to 50 mm |
| M8 | 1.25 mm | 16.0 mm | 10.0 mm | 16 mm to 60 mm |
Key Features
PVDF Knurled Screws are defined by their combination of high-end material properties and manual convenience:
Exceptional Chemical Resistance: Highly inert and resistant to halogens (chlorine), strong acids, and oxidizers, crucial for chemical handling.
Tool-Free Operation: Allows for fast, frequent access and adjustment without relying on tools, reducing assembly time.
Superior UV and Weather Resistance: Maintains properties indefinitely under direct sunlight and outdoor exposure, unlike many common plastics.
High Purity and Non-Contamination: Does not leach contaminants, ideal for pure water systems and sensitive processes.
Good Stiffness: Resists thread creep better than softer fluoropolymers like PTFE.
Key Polyvinylidene fluoride (PVDF) Properties
Advantages and Disadvantages and Usage Scenarios
| Category | Advantage (Pro) | Disadvantage (Con) | Usage Scenarios |
| Usability | Extremely fast, tool-free manual adjustment/removal. Comfortable ergonomic grip. | High Cost: Significantly more expensive than standard engineering plastics due to the high performance material. | Semiconductor Wet Benches: Securing quick-release access panels or guards on ultrapure water systems. |
| Performance | Best-in-class UV, chemical, and purity profile. Excellent dimensional stability. | Low Clamping Force: Designed for low torque; unsuitable for load-bearing structural assemblies. | Chemical Processing: Fastening inspection covers or adjustable stops on chemical lines and filtration systems. |
| Environmental | Long-term outdoor durability. Non-corrosive, non-magnetic, and non-conductive. | Slotted Drive Limitation: Provides low torque backup; easily damaged if abused. | Outdoor Instrumentation: Used on solar/weather monitoring equipment requiring high UV stability and manual adjustment. |
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.