CNC Turned Custom Aluminum Knurled Head Thumb Screw Manual Adjustment Bolt

Custom CNC Turned Aluminum Knurled Head Thumb Screw – Manual Adjustment Bolt For Tool-Free Fastening & Positioning

This precision-machined aluminum thumb screw is designed for applications requiring manual tightening, loosening, or adjustment without the use of tools. Made entirely from high-quality aluminum alloy and processed through CNC turning, this component offers a lightweight, corrosion-resistant solution for user-friendly fastening in mechanical, electronic, and industrial equipment.

Key Product Features:

• Material:
  Manufactured from durable and lightweight aluminum, offering excellent corrosion resistance, smooth surface finish, and clean metallic appearance. Suitable for both indoor and outdoor use.

• Knurled Round Knob Head:
  The main body of the screw features a circular disc-shaped knob with uniform vertical knurling around the perimeter. This textured surface enhances manual grip and friction, allowing for comfortable hand-tightening or adjustment without slipping—even in oily or wet environments.

• Integrated Smooth Shank (Threaded Shaft):
  Connected directly to the knob is a cylindrical screw shaft with a smooth surface (or custom-threaded per requirement). This shaft interfaces with a corresponding threaded hole to enable firm, tool-free fastening, positioning, or mechanical adjustment. Threading options (e.g., M6, M8, UNC, custom pitch) are available based on customer needs.

Applications Include:

• Equipment covers and access panels

• CNC machines, jigs, and fixtures

• Electronics housings and enclosures

• Adjustable brackets or mounting systems

• Any assembly requiring frequent hand-operated fastening or re-positioning

Its tool-free design makes it ideal for operator-accessible components, maintenance-friendly machines, or adjustment mechanisms where ease of use and ergonomic handling are essential.

Our Manufacturing Capabilities
We specialize in precision CNC machining of metal fasteners and custom mechanical parts. With years of OEM experience, we support complex geometry, tight tolerances, and fast production cycles tailored to your exact design.

Key Capabilities:
• Materials Available:
Aluminum (6061, 7075), stainless steel, brass, titanium, plastics (POM, Nylon), etc.
• Machining Processes:
• CNC turning and milling
• Machining for small, complex parts
• Knurling (straight, diamond, custom patterns)
• Threading: Metric, UNC, UNF, BSW, custom pitch
• Custom Options:
• Head shapes: Knob, wing, flat, T-handle, etc.
• Shaft type: Fully threaded, partially threaded, smooth
• Surface treatments: Anodizing (clear, black, color), sandblasting, polishing, etc.
• Tolerances & Quality Control:
• Dimensional tolerances: ±0.01mm (or per request)
• Surface roughness control (Ra ≤ 0.8)
• Full inspection: Thread gauges, height/matching fit, CMM checks
• ISO-compliant production and documentation
• Production Scale:
From rapid prototyping to mass production, supporting flexible order quantities and fast delivery timelines.

Looking for a custom thumb screw or tool-free fastener solution?
Send us your CAD drawings or sample today. We provide engineering support, competitive pricing, and full OEM/ODM services.

Contact us now for a free quote or technical consultation!