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)

• 50 / 1.97

Metal Finishing

• zinc plated with trivalent

External Diameter(mm)

• 45~48

External Height(mm)

• 33~36

External Material

• PA6+GF

External Shape

• Circle

FAQ

How to choose the right hand-fasten screw for your needs?

Selecting the suitable hand-tighten screw involves considering several factors, including the application environment (such as temperature, humidity, chemical...

Can I request customized materials or colors for hand-fasten screws?

Yes, we offer comprehensive customization services, including material selection, color, size, and surface treatment for hand-turned screws. Whether you need...

What quality assurances come with purchasing UJEN's thumb screws?

We provide comprehensive quality guarantees for all our handle screws. Every batch of handle screws undergoes strict quality testing to ensure it meets...

How are order logistics and delivery issues handled after placing an order?

We cooperate with several professional logistics companies to ensure safe and rapid delivery of products to our clients. Regardless of your location around...

If we need technical support, what assistance can UJEN provide?

We offer comprehensive technical support, including knob screw selection advice, installation guidance, and performance optimization. You can contact our technical...