PA66 Slotted cheese head screw
PA66 Slotted cheese 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-M12
peek plastic material: Polyamide66（PA66）
product type: Cylinder head bolts
color: Natural/Black/Other Colors(Customizable)
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PA66 Slotted cheese head screw Overview
PA66 (Polyamide 66, or Nylon 66) Slotted Cheese Head Screw is a popular, robust plastic screw known for its excellent toughness, rigidity, and superior electrical insulating properties. The Cheese Head (Cylindrical Head) design is tall with a flat top, providing maximum material volume in the head for high shear resistance. The Slotted Drive allows for simple, conventional installation.
I. Overview and Design
| Feature | Detail | Purpose |
| Material (PA66) | Polyamide 66 (Nylon 66). A high-strength, durable engineering plastic. | Provides a good balance of mechanical strength, wear resistance, and cost-effectiveness. |
| Head Style (Cheese/Cylindrical Head) | A tall, cylindrical head with a large diameter. | Maximizes the contact surface and head material volume, providing excellent shear strength and resistance to pull-through. |
| Drive Style (Slotted) | A simple single slot on the top surface. | Allows for easy installation and removal using a flat-blade screwdriver; suitable for controlled low torque. |
| Application | Medium-stress, insulating, and non-corrosive fastening in industrial and electrical assemblies. | Ideal for applications needing a robust head profile with non-metallic properties. |
Product Parameters
PA66 Slotted Cheese Head Screws typically follow metric standards for slotted cheese head screws, such as ISO 1207 (Slotted Cheese Head Screws) or similar industry specifications.
| Nominal Diameter (d) | Thread Pitch (P) | Head Diameter (D) | Head Height (K) | Slot Width (N) |
| M3 | 0.5 mm | 5.5 mm | 2.4 mm | 0.8 mm |
| M4 | 0.7 mm | 7.0 mm | 3.2 mm | 1.0 mm |
| M5 | 0.8 mm | 8.5 mm | 4.0 mm | 1.2 mm |
| M6 | 1.0 mm | 10.0 mm | 5.0 mm | 1.6 mm |
| M8 | 1.25 mm | 13.0 mm | 6.0 mm | 2.0 mm |
Key Features
The Cheese Head design combined with PA66 material properties offers significant benefits:
High Shear Strength: The large, tall head provides excellent resistance to lateral (shear) forces for a polymer fastener.
Toughness and Impact Resistance: Highly durable and resistant to breakage or chipping.
Electrical Insulation: Excellent dielectric properties, crucial for isolating electrical circuits.
Abrasive Resistance: Good resistance to wear, making it reliable in assemblies where parts move or are frequently adjusted.
Corrosion Immunity: Immune to rust and galvanic corrosion.
Key Polyamide Nylon (PA6) Properties
Applications
PA66 Slotted Cheese Head Screws are commonly used in applications requiring a robust head and electrical safety:
Electronics and Control Panels: Mounting components, securing internal chassis parts, and attaching terminal blocks where high rigidity and electrical isolation are needed.
Jigs and Fixtures: Used in non-critical manufacturing tooling for locating and clamping parts.
Appliance Manufacturing: Fastening internal components that require robust mechanical strength and resistance to vibration.
Display and Instrumentation: Securing cover panels and housing components that require a strong, stable head profile.
Advantages
| Category | Advantage (Pro) | Disadvantage (Con) |
| Performance | High shear and tensile strength for a polymer. Excellent toughness and non-conductivity. | Moisture Absorption: Nylon absorbs water, which can lead to slight swelling and reduction in strength over time. |
| Design | Cheese Head provides maximum material strength in the head and an excellent bearing surface. Cost-effective. | Slotted Drive Limitation: Provides low torque transmission and is highly prone to tool slip (cam-out). |
| Environmental | Resistant to oils and fuels. Lightweight. | Limited Chemical Resistance: Susceptible to strong acids, bases, and oxidizing agents. |
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.