Unique Bargains 4 Sets Knurled Knobs Thumb Screws with Nuts Washers Metric M4 x 30mm Male Thread 14mm Plastic Head Zinc Plated Carbon Steel Stud Hand Knobs Clamping Thumbscrews Handles Black

Safe and secure knurled thumb screws for the ultimate in adjusting and tightening control.

Hand Knob with Stud: Zinc plated carbon steel threaded studs on knurled knobs ensure durability, strength, functionality and wear resistance; The tightly-in metal threaded stud can securely join components together, easy to install, suitable for various applications; Washers and nuts are made of carbon steel with high hardness and zinc-plated surface for corrosion and rust resistance.

Features: The knurled texture on the surface provides better grip, making it easier to tighten or loosen the knob; Threads are neat and clear, the force is even and deep, not easy to slip, and there are no burrs; Durable plastic knobs provide a smooth and beautiful surface as well as a comfortable grip.

Applications: Knurled knobs are commonly used in applications that require frequent adjustments or tightening; Widely used in lathes, drill presses, sawing machines, packaging and woodworking machinery, printing, instrument and industrial equipment, and fixtures.

Tips: Always tighten the knurled knob securely to prevent any movement of the fixed assembly; Do not over-tighten the knob as this may damage or strip the threads in the mating assembly; Replace the knob if necessary.