4pc M5 Adjustable Knurled Thumb Shoulder Screws 6-100mm Stainless Steel Aluminum

Measure the total stack thickness of the materials being clamped, then add the thread engagement depth required for your nut or threaded insert (typically 1× to 1.5× the thread diameter for M5, so 5–7.5 mm). Select the next available length that meets or slightly exceeds that total. For floating panel assemblies, the shoulder length — not the thread length — determines the clearance gap.

Stainless steel variants offer higher tensile strength and corrosion resistance, making them suitable for humid environments, outdoor enclosures, or applications requiring repeated high-torque hand-tightening. Aluminum variants are lighter and the anodized finish provides color depth, making them preferred for weight-sensitive assemblies such as drone frames, camera rigs, or portable instrument panels.

Yes. The threaded section uses standard M5 metric coarse thread, compatible with M5 hex nuts, nylon-insert locknuts, threaded inserts (heat-set or press-fit), and tapped M5 holes in aluminum, steel, or plastic. Confirm thread pitch matches your existing hardware before ordering.

Yes. The machined shoulder provides a smooth cylindrical bearing surface that can function as a pivot point in light-duty linkages or as a guide pin in slotted panel assemblies. Ensure the shoulder diameter matches your slot or bore clearance — contact us to confirm shoulder dimensions for your selected variant.

Anodized finishes on aluminum are integral to the surface — not a coating that peels — and resist scratching, UV fading, and mild chemical exposure better than painted finishes. Under normal indoor use, color retention is long-term. Avoid prolonged exposure to strong acids or alkalis, which can degrade anodized layers over time.

Knurled thumb screws are designed for hand-tightening only. Typical achievable hand torque is approximately 0.3–0.8 N·m depending on finger strength and knurl grip. For applications requiring higher clamping force, consider using a standard M5 socket head cap screw instead. These screws are optimized for frequent, tool-free access rather than structural clamping.

Stainless steel variants are suitable for high-humidity and outdoor-adjacent environments due to their corrosion resistance. Anodized aluminum variants offer moderate corrosion resistance but are better suited for indoor or sheltered applications. For marine or salt-spray environments, stainless steel is the recommended choice.