#6-32 Knurled Thumb Screws — Aluminum Alloy, 3 Lengths, 10 Colors, DIY Hand Grip Knob Bolts

Measure the depth of the threaded hole or standoff you're fastening into, then choose the length that provides full thread engagement without bottoming out. The 6.5mm (≈17/64") suits shallow standoffs and thin panel applications. The 12mm (≈15/32") is a versatile mid-length for medium-thickness panels, enclosures, and DIY fixtures. The 16mm (≈5/8") is suited for thicker assemblies, stacked panels, or applications where additional grip length is needed for hand tightening.

These aluminum alloy thumb screws are designed for hand-tightened, tool-free applications where moderate clamping force is needed — not for high-torque structural joints or load-bearing connections. For typical DIY fixtures, jigs, enclosure panels, and access covers, aluminum thumb screws generally provide sufficient retention force for secure, repeatable fastening. For higher-load applications, a stainless steel thumb screw is typically recommended.

These screws are made from aluminum alloy, which is naturally corrosion-resistant for typical indoor use. They are not specifically rated for outdoor, marine, or high-humidity environments. For demanding outdoor or damp applications, a stainless steel thumb screw is generally the more suitable choice. These are optimized for indoor DIY projects, electronics enclosures, and workshop fixtures.

These screws use the #6-32 UNC (Unified National Coarse) thread standard — the most common inch-series thread size used in US-standard PC cases, server chassis, electronics enclosures, and many DIY hardware applications. They are compatible with any standard #6-32 threaded standoff, tapped hole, or nut. Always verify the thread specification of your mating component before ordering to ensure compatibility.

The 6.5mm (≈17/64") shank length sits between the common 6mm and the longer 10mm options, providing slightly deeper thread engagement than a 6mm screw while remaining compact. This makes it a useful option when a 6mm screw is marginally too short for your standoff depth but a 10mm or 12mm screw would be unnecessarily long. It is particularly suited for DIY enclosures and fixtures with non-standard standoff depths.

No. The color finish is anodized or coated and is purely aesthetic — it does not affect thread dimensions, shank length, or mechanical performance. All color variants share the same #6-32 UNC thread and the same dimensions within each size option. Color-coding is a practical way to organize panels, differentiate fastener locations, or match your DIY project's color scheme.

These are sold individually — 1 piece per order. This allows you to order exactly the quantity you need in your chosen size and color combination without committing to a fixed pack size. If you need larger quantities, please contact us to discuss bulk pricing options.