UJEN DEVELOPMENT CO., LTD. - UJEN is a manufacturer with 45 years of experience in producing hand screws, offering custom services and professional mold-making capabilities for knobs & handles.

Small Indexing Plunger with Circle Plastic Clamping Knob, rest position, M12 x 30mm, D29, pin8 | Achieve Ergonomic Efficiency with Adjustable Handles for Machinery

A vital hold-open feature that suits demanding applications in B2B contexts. For small AV or medical devices that need comfortable spring plunger locking, Our mini lineup (M8–M16, 4–10mm pins) has a “stay-pulled” mode: pull, rotate, and release. The knob includes a ring plus four styles, with seven ring/disc colors for a standout look, and wood fiber or oyster shell plastic for reduced waste. Taiwan CNC and mold production ensure precision and durability, while ISO9001 processes enable large or custom B2B orders in automotive-aerospace, semiconductors, sports, etc. UJEN is an ISO 9001 certification Small Indexing Plunger with Circle Plastic Clamping Knob, rest position, M12 x 30mm, D29, pin8, Mini spring loaded pull pin, Tiny indexing plunger, Pop pin 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.

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Mini spring loaded pull pin, Tiny indexing plunger, Pop pin | Enhance Your Equipment with Durable Knob Screws for Easy Adjustment"

Lock mini pull pin M12x30mm PIN8mm Appearance | Customizable knob screws from Taiwan

Small Indexing Plunger with Circle Plastic Clamping Knob, rest position, M12 x 30mm, D29, pin8 - Lock mini pull pin M12x30mm PIN8mm Appearance
  • Small Indexing Plunger with Circle Plastic Clamping Knob, rest position, M12 x 30mm, D29, pin8 - Lock mini pull pin M12x30mm PIN8mm Appearance
  • Four different shapes (concave, plane, convex and dot) with shaped knobs
  • 49 color combinations for customers to choose from at top of the pull pin
  • Indexing plunger can match the unique macaroon color system developed by UJEN, or customize the color to meet your needs.

Small Indexing Plunger with Circle Plastic Clamping Knob, rest position, M12 x 30mm, D29, pin8

PSK300F-291230N0808

Mini spring loaded pull pin, Tiny indexing plunger, Pop pin

A vital hold-open feature that suits demanding applications in B2B contexts. For small AV or medical devices that need comfortable spring plunger locking, Our mini lineup (M8–M16, 4–10mm pins) has a “stay-pulled” mode: pull, rotate, and release. The knob includes a ring plus four styles, with seven ring/disc colors for a standout look, and wood fiber or oyster shell plastic for reduced waste. Taiwan CNC and mold production ensure precision and durability, while ISO9001 processes enable large or custom B2B orders in automotive-aerospace, semiconductors, sports, etc.

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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 99 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
Dimensional drawing of Small Indexing Plunger with Clamping Knob
Thread Size
  • M12
Thread Material
  • Steel
Screw Length(mm/inch)
  • 30 / 1.18
Plunger Diameter(mm)
  • 8
Metal Finishing
  • zinc plated with trivalent
External Diameter(mm)
  • 29~32
External Height(mm)
  • 29~32
External Material
  • PA6+GF
External Shape
  • Circle
Gallery
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Small Indexing Plunger with Circle Plastic Clamping Knob, rest position, M12 x 30mm, D29, pin8 | 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, rest position, M12 x 30mm, D29, pin8, 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.