3/8-16UNC Knurled Thumb Screws — Stainless Steel & Anodized Aluminum Hand Grip Bolts

Measure the total thickness of the material you need to clamp or fasten, then add the thread engagement depth — generally at least 1x the thread diameter (about 3/8" or 9.5mm) for steel, and 1.5x for softer materials like aluminum or plastic. For example, if your panel is 10mm thick, a 20–25mm length is typically a good starting point. All lengths are listed in mm; divide by 25.4 to convert to inches (e.g., 25mm ≈ 1").

A2 stainless steel thumb screws generally offer good tensile strength for hand-tightened fastening applications. Because these are designed for tool-free use, they are typically used in light-to-medium duty clamping, panel retention, and equipment access covers — not for structural or high-vibration load-bearing joints. Contact us to confirm suitability for your specific load requirements.

The A2 stainless steel variants offer good corrosion resistance and are generally suitable for outdoor use in mild to moderate environments. The anodized aluminum variants provide surface-level corrosion protection but are better suited for indoor or sheltered applications. For harsh marine or chemical environments, contact us to confirm compatibility.

Yes. These use the 3/8-16 UNC (Unified National Coarse) thread standard, which is one of the most common inch-series thread sizes in the US. They are compatible with any standard 3/8-16 UNC tapped hole or threaded insert. Note: these are not compatible with metric M10 threads, which have a different pitch and diameter.

The A2 stainless steel version offers higher strength and better corrosion resistance, making it suitable for more demanding or outdoor applications. The aluminum version is lighter and features anodized color finishes (Royal Blue, Green, Black, etc.), making it popular for electronics enclosures, RC builds, and aesthetic panel fastening where weight and appearance matter.

Yes — that is the primary design intent. The knurled head provides a textured grip surface that allows hand-tightening and loosening without a screwdriver or wrench. They are ideal for applications requiring frequent access or adjustment, such as equipment covers, inspection panels, and adjustable fixtures.

No. The color options (Royal Blue, Green, Black, Silver, Purple, Pink, Sky Blue, Orange, Wine Red, Auratus/Gold) are anodized surface finishes applied to the aluminum variants. The finish is decorative and provides a thin layer of surface protection but does not affect the mechanical properties of the fastener.