Small Indexing Plunger with Circle Clamping Knob, M8 x 1.0 x 15mm, D21, pin6
PSK300-2108150606
Spring loaded pull pin, Indexing plunger, Pop pin
For high-precision compact products like medical or automotive items, oversized plungers can be problematic. UJEN’s mini plungers span M8, M10, M12, M16, with 4–10mm pin options. The knob includes a ring plus four style choices, and 7 color ring/disc combos to match brand identity. Taiwan CNC and mold methods ensure reliable locking and durability, while wood fiber or oyster shell plastics reduce waste. ISO9001-certified, UJEN supports bulk or custom B2B solutions.
Function
Small spring pin is ideal for fast fixing of parts, especially when the pins are constantly being removed and relocked. Pull up the knob, as the pin is pulled as well so as to allow users to quickly adjust expansion tubing. Insert back after release the knob. This pull pin can clamped the tubing with tightened by a hand (no tools needed).
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
- M8 x 1.0
Thread Material
- Steel
Screw Length(mm/inch)
- 15 / 0.59
Plunger Diameter(mm)
- 6
Metal Finishing
- zinc plated with trivalent
External Diameter(mm)
- 21~24
External Height(mm)
- 21~24
External Material
- PA6+GF
External Shape
- Circle
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Small Indexing Plunger with Circle Clamping Knob, M8 x 1.0 x 15mm, D21, pin6 | 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, M8 x 1.0 x 15mm, D21, pin6, 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.