UNC 1/4-20 Aluminum Knurled Flat Thumb Screws 30mm (1-3/16") – Hand Grip Bolts for PC Case & Camera

30mm (approximately 1-3/16") is a longer thumb screw suited for applications where the screw must pass through a thicker panel, spacer, or stacked material before engaging the threaded receiver. For a 1/4-20 screw, you generally want at least 3/8" of thread engagement in the receiving material. Measure your total stack thickness and subtract it from 30mm to estimate remaining thread engagement. If your stack is thinner and you need a shorter screw, see our 10mm or 16mm listings. Contact us if you need a custom length.

Aluminum alloy flat thumb screws are generally suited for light-to-medium hand-tightened clamping loads — PC case panels, camera accessory mounts, enclosure covers, and DIY fixture assemblies. They are not intended for high-torque structural applications where steel fasteners are typically required. For repeated hand-tightening cycles in non-impact applications, aluminum alloy generally holds up well.

Aluminum alloy has natural corrosion resistance, making these screws generally suitable for light outdoor or humid-environment use. For prolonged salt-spray exposure or fully submerged conditions, stainless steel fasteners are typically recommended. Contact us to confirm suitability for your specific environment.

These use UNC (Unified National Coarse) 1/4-20 threading — 1/4" diameter, 20 threads per inch. The 1/4-20 standard is widely used in PC case hardware, camera tripod mounts, photography accessories, and general fabrication in the US. They are compatible with any standard UNC 1/4-20 nut, threaded insert, or tapped hole.

Choose the 30mm (1-3/16") length when your application requires the screw to pass through a thicker panel, spacer, or stacked assembly before reaching the threaded receiver — for example, a PC case side panel with a thick bracket behind it, or a camera rig with multiple stacked plates. The 10mm and 16mm versions are better suited for thin panels or shallow tapped holes. If you are unsure, measure your total stack thickness and compare against the screw length.

No — all color variants are made from the same aluminum alloy material. The 10 colors (Wine Red, Pink, Golden, Royal Blue, Sky Blue, Bright Black, Bright Silver, Emerald, Portuguese Purple, Brown Orange) are anodized or coated surface finishes. They do not affect thread dimensions or mechanical performance and are primarily used for visual identification, color-coding, or aesthetic customization.

Yes — this listing is available in a 50-piece pack in addition to smaller quantities (1, 3, 5, and 10 pieces). The 50-piece option offers a lower per-unit cost and is suitable for production runs, multi-unit builds, or stocking a workshop. Order a single piece first to confirm fit before committing to a bulk pack.