Small Indexing Plunger with Circle Clamping Knob, rest position, M16 x 1.5 x 12mm, D33, pin10
PSK300F-3316121010
Mini spring loaded pull pin, Tiny indexing plunger, Pop pin
An all-in-one mini plunger offering advanced rest-locate convenience. If small automotive or medical parts need a mini spring plunger that stays open after pulling, Our M8–M16 and 4–10mm lineup solves this. The knob features a circular ring plus four designs, with seven ring/disc colors for customization; wood fiber or oyster shell plastic helps cut waste. Taiwan CNC and mold processes ensure tight tolerances and wear resistance, while ISO9001 compliance supports large or custom B2B orders in sports, aerospace, semiconductors, and AV for more efficient locking.
Function
UJEN Mini Spring Pull Pins with Rest Position are designed specifically for rapid fastening, frequent adjustment, and convenient repositioning. Simply pull and rotate the top knob 101 degrees to maintain the pin in a fully disengaged (rest) position, allowing users the freedom to adjust components easily with both hands.
After repositioning, simply rotate the knob directly to re-engage the pin into the hole (new improved feature), eliminating the need for an additional pulling action. This innovative improvement significantly enhances operational efficiency.
Additionally, this mini pull pin enables quick hand-tightening by rotating the top knob manually, securely fastening components and effectively preventing vibration or looseness without tools. Widely used in fitness equipment, medical devices, mechanical assemblies, furniture hardware, and more, it provides a reliable solution for precise and rapid component adjustments.
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
- Related ProductsFAQ
Small Indexing Plunger with Circle Clamping Knob, M16 x 1.5 x 12mm, D33, pin10
PSK300-3316121010
High repeatability ensures the mini plunger remains precise over time. Mini plungers can be operated...
Details Add to ListSmall Indexing Plunger with Circle Clamping Knob, M16 x 12mm, D33, pin10
PSK300-331612N1010
A mini tension pin proven to reduce downtime in automated processes. In semiconductor or specialized...
Details Add to ListSmall Indexing Plunger with Circle Clamping Knob, rest position, M16 x 12mm, D33, pin10
PSK300F-331612N1010
Engineered for reliability, the rest-locate mechanism rarely fails under stress. If mini plungers...
Details Add to List
Small Indexing Plunger with Circle Clamping Knob, rest position, 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 Clamping Knob, rest position, 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.