M3/4/5 Knurled Thumb Screws / Nut Red Hand Grip Knob Bolt SS + Alu For Camera PC

The D12×H12 head is more compact and suits applications with limited clearance around the fastener, such as tight camera cage slots or shallow panel cutouts. The D12×H20 and D16×H20 heads offer a taller grip surface, making them easier to turn in applications where you need more torque by hand or where gloves are worn. If space allows, the taller head is generally easier to operate.

The stainless steel shaft provides solid thread strength suitable for light-to-medium clamping loads typical of camera rigs, PC panel mounts, and DIY enclosures. They are not rated for high-torque structural joints or vibration-critical applications where a torqued hex bolt with a locking element would be required. For hand-tightened adjustment and quick-release applications, the strength is appropriate.

Anodizing is an electrochemical surface treatment that penetrates the aluminum rather than sitting on top like paint, so it is significantly more durable than a painted or powder-coated finish. With normal hand-tightening use the color holds well. Abrasive contact or harsh chemical exposure can wear the anodizing over extended periods, but for typical camera and electronics assembly use the finish is durable.

Yes. M3, M4, and M5 metric coarse threads are the most common thread sizes in aluminum extrusions, camera cages, PC cases, and 3D-printed parts. As long as your panel or insert uses standard metric coarse pitch (M3×0.5, M4×0.7, or M5×0.8), these screws will thread in directly. If your application uses a non-standard or fine pitch, contact us before ordering.

The Screw variant is a standard externally threaded fastener — it threads into a tapped hole or a nut. The Nut (Blind hole) variant is an internally threaded knurled knob with a closed bottom, meaning the thread does not pass all the way through. Blind-hole nuts are used when you want to cap the end of a bolt or stud and tighten by hand without a wrench, and they prevent debris from entering the thread from the back.

These thumb screws use metric threads (M3, M4, M5), not imperial UNC threads. A 1/4"-20 thread is not the same as M6, and a 3/8"-16 is not the same as M10. If your camera cage uses 1/4"-20 or 3/8"-16 threads, these screws will not fit. They are designed for metric-threaded equipment such as PC cases, aluminum extrusion frames, and metric-standard camera accessories. Contact us to confirm compatibility if you are unsure.