M6 Knurled Thumb Screws Aluminium Hand Grip Knob Bolts High Type - DIN 464

Select a length that gives at least 1× the thread diameter of engagement in your tapped hole — for M6 that means a minimum of 6 mm of thread engagement. For aluminium tapped holes, aim for 1.5–2× (9–12 mm engagement). If your panel is 3 mm thick and you're threading into a nut behind it, an 8 mm or 10 mm screw is typically sufficient. For deeper blind holes or stacked panels, choose 14–20 mm.

These aluminium DIN 464 thumb screws are designed for hand-tightened, frequently adjusted connections — not for high-torque structural joints. They are well suited to panel retention, jig fixtures, enclosure lids, and light-duty clamping. For load-bearing or vibration-critical joints, a steel fastener with a locking element is more appropriate.

Anodising is an electrochemical process that converts the aluminium surface into a hard oxide layer — the colour is integral to the material, not a paint coat applied on top. Under normal hand-tightening use, the finish is durable. Abrasive contact with sharp steel edges or aggressive solvents can wear the anodised layer over time, but for typical workshop and lab use the colour holds well.

Yes. The M6 × 1.0 mm thread is the standard ISO coarse pitch for M6 fasteners and is compatible with any M6 hex nut, flange nut, T-slot nut (commonly used in aluminium extrusion profiles), or M6 tapped hole machined to ISO 261 tolerances. Always confirm the nut or tapped hole is M6 × 1.0 mm rather than a fine-pitch variant before ordering.

Colour selection is primarily functional or aesthetic. A common approach is to assign one colour per access panel type — for example, Black for power-related covers, Red for safety-critical panels, and Silver for general access. In 3D printer builds, matching the thumb screw colour to the frame accent colour is popular. All colours share identical mechanical specifications; the choice does not affect thread dimensions or load capacity.

Anodised aluminium has reasonable corrosion resistance for light outdoor or humid indoor use. However, aluminium is susceptible to galvanic corrosion when in direct contact with dissimilar metals (such as steel) in the presence of moisture. For prolonged outdoor exposure or marine environments, consider using an isolating washer between the screw and a steel surface, or contact us to confirm suitability for your specific conditions.

DIN 464 specifies the "high type" knurled thumb screw, which has a taller cylindrical head relative to the thread diameter. This gives more surface area for finger grip and allows higher hand-applied torque. The "low type" (DIN 653) has a flatter, disc-shaped head suited to applications with limited vertical clearance. If your enclosure has tight clearance above the fastener, measure available head height before selecting high-type screws.