PA66 Slotted counter sunk head screw
PA66 Slotted counter sunk head screw has excellent wear resistance and oil resistance, and it is self-extinguishing (UL94V-2). It is not resistant to strong acids and has high water absorption.
M Size: M2-M10
peek plastic material: Polyamide66（PA66）
product type: Countersunk bolts
color: Natural/Black/Other Colors(Customizable)
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PA66 Slotted counter sunk head screw Overview
PA66 (Polyamide 66, or Nylon 66) Slotted Countersunk Head Screw is a widely used plastic screw known for its excellent toughness, low friction, and electrical insulation. The Countersunk Head is designed to sit flush with the surface of the material, providing a clean, smooth finish, while the Slotted Drive allows for easy installation.
I. Overview and Design
| Feature | Detail | Purpose |
| Material (PA66) | Polyamide 66 (Nylon 66). A high-strength, durable engineering plastic. | Provides excellent mechanical properties, non-conductivity, and resistance to abrasion at a cost-effective price. |
| Head Style (Countersunk) | Features a flat top surface and a tapered underside (conical). | Designed to recess into a prepared hole, allowing the head to sit flush with the surface for a smooth, clean finish. |
| Drive Style (Slotted) | A simple single slot on the top surface. | Allows for installation using a flat-blade screwdriver; suitable for controlled low torque. |
| Application | Non-corrosive, insulating fastening requiring a smooth, flush surface finish. | Ideal for securing panels, trim, or components that should not impede movement or snag. |
Product Parameters
PA66 Slotted Countersunk Head Screws typically follow metric standards for slotted countersunk head screws, such as ISO 2009 (Slotted Countersunk Flat Head Screws).
| Nominal Diameter (d) | Thread Pitch (P) | Head Diameter (D) | Head Angle | Slot Width (N) |
| M3 | 0.5 mm | 5.6 mm | $90^\circ$ | 0.8 mm |
| M4 | 0.7 mm | 7.5 mm | $90^\circ$ | 1.0 mm |
| M5 | 0.8 mm | 9.2 mm | $90^\circ$ | 1.2 mm |
| M6 | 1.0 mm | 11.0 mm | $90^\circ$ | 1.6 mm |
| M8 | 1.25 mm | 14.5 mm | $90^\circ$ | 2.0 mm |
| M10 | 1.5 mm | 18.0 mm | $90^\circ$ | 2.5 mm |
Key Features
PA66 Countersunk Screws offer a crucial aesthetic and functional benefit:
Flush Finish: The head recesses completely, eliminating protrusions and creating a smooth, professional surface finish.
Toughness and Impact Resistance: Highly resistant to breakage and damage from impact, making it very durable.
Electrical Insulation: Excellent dielectric properties, crucial for isolating electrical circuits.
Abrasive Resistance: Good resistance to wear, useful in assemblies that may be frequently cleaned or handled.
Corrosion Immunity: Will not rust or cause galvanic corrosion.
Key Polyamide Nylon (PA6) Properties
Advantages
| Category | Advantage (Pro) | Disadvantage (Con) |
| Aesthetics/Function | Creates a smooth, snag-free, flush surface. High mechanical strength for a polymer. | Requires Preparation: Installation requires a precise countersunk hole, adding a step to the assembly process. |
| Material | High toughness and cost-effective. Excellent electrical insulator. | Moisture Absorption: Nylon absorbs water, which can lead to dimensional changes and reduced strength over time. |
| Design | Suitable for applications needing non-metallic strength. | Slotted Drive Limitation: Provides low torque transmission and is prone to cam-out, especially when driving into soft plastic. |
Applications
PA66 Slotted Countersunk Head Screws are commonly used where a clean, safe, and electrically insulated surface is required:
Automotive Interiors: Securing trim, paneling, and dashboard components where a flush fit is necessary for aesthetics and safety.
Electronic Enclosures: Fastening access covers, doors, and internal mounting plates in equipment where the screw head cannot interfere with nearby components.
Appliance Manufacturing: Used on outer surfaces of appliances (e.g., washing machines, dryers) for a smooth, easy-to-clean finish.
Marine: Securing internal deck plates or fittings where corrosion immunity and a trip-hazard-free surface are needed.
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.