Thumb Plastic Hand Knob Screw (Nut)

Colorful Thumb screws, hand knob screw manufacturer. 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. UJEN is a high-quality Thumb Plastic Hand Knob Screw (Nut), Hand screw, hand nut, knob screw, thumb knob, plastic knob, adjustable handle, grip knob, indexing plunger manufacturer from Taiwan since 1994. UJEN Development Co., Ltd., with over 45 years of expertise, specializes in manufacturing precision hand screws, knob screws, plastic knobs, adjustable handles, and indexing plungers. As an ISO 9001:2015 certified company, we offer custom solutions and professional mold-making capabilities to enhance product functionality and brand value. Our commitment to quality and innovation ensures we meet the specific needs of our customers in various industries. UJEN is a leading manufacturer of high-quality hand screws in the screw parts industry. With over 40 years of expertise in plastic injection mold development, we have specialized in crafting precision rotary knobs and handles. We offer technical consulting services and customized design solutions to provide full-service from design to production.

Thumb screws are available in UJEN's unique macaroon color

Colorful Thumb screws, hand knob screw

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, thumb knob screws 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. A variety of shapes and sizes, you can choose from the specifications in the field below

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Thumb Plastic Hand Knob Screw (Nut)

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