Small Indexing Plunger with Circle Plastic Clamping Knob, M16 x 1.5 x 12mm, D33, pin10
PSK300-3316121010
Mini spring loaded pull pin, Tiny indexing plunger, Pop pin
High repeatability ensures the mini plunger remains precise over time. Mini plungers can be operated single-handedly with minimal effort. Our range offers M8, M10, M12, M16 and 4–10mm pins, with a knob featuring a ring plus four designs, plus 7 ring/disc colors for aesthetics; wood fiber or oyster shell plastic helps reduce waste. Taiwan CNC and mold production yield tight tolerances and durability, and our ISO9001-managed workflows ensure swift delivery of bulk or custom orders. Ideal for medical, automotive-aerospace, sports equipment, specialized machinery, and semiconductors in B2B environments.
Function
UJEN Mini Spring Pull Pins are ideal for applications requiring compact size, frequent adjustment, and quick fastening. Simply pull the compact knob upward to release the pin from its hole, adjust the component to your desired position, and release—the internal spring immediately re-engages the pin for precise positioning.
Additionally, this pull pin features a special knob design allowing manual rotation to tighten screws directly by hand, ensuring stable clamping and preventing component vibration or loosening without needing tools. Perfectly suited for fitness equipment, medical devices, mechanical assemblies, and furniture hardware.
Features
- RoHS REACH compliant.
- Pull and release process smoother.
- 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 fitting tolerance between metal parts is small, reducing sway.
- The rounded corner of the Plunger's front end increases smoothness of insertion.
- The chamfered front end of the screw makes assembly smoother and reduces wear on the mating end face.
Dimensions

Thread Size
- M16 x 1.5
Thread Material
- Steel
Screw Length(mm/inch)
- 12 / 0.47
Plunger Diameter(mm)
- 10
Metal Finishing
- zinc plated with trivalent
External Diameter(mm)
- 33~36
External Height(mm)
- 33~36
External Material
- PA6+GF
External Shape
- Circle
Gallery
- Customized service for Bolt, Screw & Nut (metal parts)
- The center pin can be fitted with an anti-scratch pad to minimize scratches on the surface of the locked object.
- Optional accessories of knobs, handles, pull pins
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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...
Small Indexing Plunger with Circle Plastic Clamping Knob, M16 x 1.5 x 12mm, D33, pin10 | Achieve Ergonomic Efficiency with Adjustable Handles for Machinery
Based in Taiwan since 1994, UJEN DEVELOPMENT CO., LTD. expertise in manufacturing high-quality Small Indexing Plunger with Circle Plastic Clamping Knob, M16 x 1.5 x 12mm, D33, pin10, hand screws, knob screws, adjustable handles, grip knobs, and indexing plungers. Their commitment to customization and precision ensures each component, from hand screws to indexing plungers, meets rigorous standards. This dedication positions UJEN as a leader in supplying durable and reliable industrial components to global markets.
UJEN Development Co., Ltd. is a leading manufacturer of precision-engineered hand screws, knob screws, plastic knobs, adjustable handles, and indexing plungers for a variety of industrial needs. Our 45-year legacy, combined with ISO 9001:2015 certification, underscores our commitment to quality, innovation, and customer satisfaction. Specializing in custom solutions, we excel in professional moldmaking, enhancing equipment functionality across industries.
UJEN has been offering customers high-quality hand screws for industrial machinery since 1994, both with advanced technology and 47 years of experiences, UJEN ensures each customer's demands are met.







