1/4-20 Black Star Knobs, Pack of 10

These black star knobs are threaded thumb nuts designed for mechanical instruments, umbrella bases, and workshop equipment. Each knob features a 1/4-20 thread size with a 25mm head diameter and 20mm screw length.

The knobs combine a durable plastic head with a carbon steel, galvanized-steel core. This construction delivers high hardness and deep, clear threads that support smooth rotation and consistent fastening without slipping. The surface is smooth and burr-free, ensuring comfort and safety during handling.

The ergonomic star design provides excellent grip control and precise tightening. The hex-shaped handle allows you to adjust clamping tension at any time, making these knobs suitable for fine-tuning applications. Their compact size fits easily in tight spaces, and the secure fastening effect prevents loosening during operation.

These knobs work well for car roof boxes, workshop equipment fixation, woodworking jigs, drawing boards, and other applications requiring adjustable mechanical fastening. The female threaded hexagon head design accommodates standard 1/4-20 bolts.

Pack includes 10 knobs. Select these star knobs to improve grip control on your mechanical assemblies and ensure reliable, scratch-free tightening.