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)

• 35 / 1.38

Metal Finishing

• zinc plated with trivalent

External Diameter(mm)

• 45~48

External Height(mm)

• 33~36

External Material

• PA6+GF

External Shape

• Circle

FAQ

Does UJEN offer thumb screw samples for evaluation?

Yes, we are more than happy to provide knob screw samples for clients to evaluate and test. We believe that actual product experience can help clients...

How can UJEN ensure its handle screw nuts meet our environmental requirements?

We understand the importance of environmental protection for our clients and society. All UJEN's handle screw nuts strictly adhere to international environmental...

If our requirements change, can UJEN flexibly adjust the order?

We understand that market demands can change, so our production and logistics systems are designed with enough flexibility to accommodate changes in customer...

How does UJEN ensure the continuous innovation and development of new knob screws?

We have a dedicated R&D team responsible for the innovation and development of new knob screws. By continuously exploring the latest technological trends,...

What long-term value does partnering with UJEN offer?

Partnering with UJEN means not only obtaining high-quality spring plungers and other hardware accessories but also represents a long-term partnership....

Are UJEN's hand knob screws and indexing plungers manufactured in Taiwan?

All our handle screws and spring plungers are manufactured in Taiwan. UJEN is committed to local production, which not only supports Taiwan's economic...