The external thread knurled clamping knob is made of high-quality carbon steel with good hardness, strength, corrosion and abrasion resistance; the threaded female nail is a fastening accessory that can be used for a long period of time. The surface of the grip thumb screw on type round head is smooth, the thread is neat and uniform, without burrs, and with screwed-in design, which is easy to install. Knobs grips screws are widely used in mechanical equipment, instrumentation, electrical appliances, food and pharmaceutical industry equipment, is a good helper to fasten a variety of instruments; threaded knurled female nails can also be used for hardware and machinery furniture, lighting, equipment, construction and other decorative, and can also be easy to cope with your daily home equipment when problems arise. It is recommended that you need washers as gaskets when installing some monitors to prevent affect to the computer monitor. The length of the screw part is 10 mm, which may bottom out on some computer monitors. You just need a layer of buffer to prevent direct contact in some cases.

Specification:
Product Name: Knob screws.
Size: Total height: 22mm / 0.86inch.
Head Diameter: 14mm / 0.55inch.
Thread diameter: M4.
Thread Length: 10mm / 0.39inch.
Material: Carbon steel and PP.
Color: Black.

Notes:
1.Small items may include, please keep them away from little children.
2.Manual measurement, please allow slight errors on size.
3.The color may exist slight difference due to different screen displays.
You will receive:

20pcs threaded knurled thumbscrew.