Function

Plastic knob screws are produced via a one-shot injection molding process, firmly bonding the screw shaft to the knob body. This construction eliminates concerns about loosening or having to replace the screw. Their core advantage lies in combining the convenience of manual tightening with long-term stability. Made from an impact-resistant, wear-resistant nylon-glass fiber composite via injection molding, these screws maintain a reliable locking force even under light vibration, high loads, or frequent assembly and disassembly.

By minimizing extra metal components, they reduce issues such as rust or cold welding while providing insulation and a lightweight design—ideal for electronics, sports equipment, factory automation, and even medical devices. The knob’s edges feature anti-slip texturing and an ergonomic shape, allowing users to quickly tighten or remove it by hand, sparing the need for wrenches or other tools. Adding a scratch-proof pad further protects the locking interface, preventing scratches or vibration noise.

Additionally, these screws have passed ISO9001, ROHS, REACH, and SGS certifications, indicating that every stage—from raw materials to manufacturing—meets environmental and safety standards. Overall, the primary focus of plastic knob screws is quick, efficient operation with high durability and resistance to loosening. They deliver a long-lasting, secure locking performance while aligning with various equipment needs for green production and ergonomic design.

Features

• RoHS REACH compliant.
• Thread is class 2.
• Flame-proof, heat-resistant, anti-UV properties.
• The head knob has a matte finish.
• The head knob does not hurt hands, no sharp angles or burrs.
• The knob is easy to tight with a hand. the best design of beauty and grip.
• The metal is shiny and detailed.
• Zinc-plated metal, stable corrosion resistance.
• The chamfered front end of the screw makes assembly smoother and reduces wear on the mating end face.

Dimensions

Thread Type

• Chamfered screw

Thread Size

• M6

Thread Material

• Steel

Screw Length(mm/inch)

• 45 / 1.77

Metal Finishing

• zinc plated with trivalent

External Diameter(mm)

• 45~48

External Height(mm)

• 33~36

External Material

• PA6+GF

External Shape

• Circle

FAQ

What measures does UJEN take regarding environmental protection?

Environmental protection is an integral part of our operation. UJEN is committed to reducing the environmental impact of our production processes, strictly...

In which fields are UJEN's handle screws applicable?

Our knob screws are widely used in various fields, including mechanical manufacturing, medical equipment, sports equipment, monitor stands, fitness equipment,...

How does UJEN handle customer feedback and after-sales issues?

Customer satisfaction is our top priority. We have a dedicated customer service team responsible for addressing customer feedback and after-sales issues,...

What makes UJEN's research and development in plastic head screws distinctive?

Our plastic head screw nuts R&D team consists of industry-experienced engineers and designers, possessing forward-thinking design concepts and deep technical...

What is UJEN's global market strategy?

As a company with an international outlook, UJEN actively expands into the global market, establishing stable cooperative relationships with clients in countries...