Spring Pull Pin with Star Knob, M12 x 1.5 x 28mm, D27
PNK170-2712280606
Spring loaded pull pin, Indexing plunger, Pop pin
Enter UJEN’s pull knob to elevate your pins or center columns: four head shapes (concave, flat, convex, dotted), each configurable with a color ring and color disc (7 shades apiece). Our CNC lathe processes, refined by Taiwan’s precision mold roots, guarantee solid tolerances. Eco-minded users can select oyster shell or wood fiber for plastic reduction, and we factor ergonomics into the design for smoother handling. ISO9001 management seals consistent quality across large or tailor-made orders. This pull knob thrives in industries such as specialized machinery, sports equipment, automotive, medical, or aerospace, helping B2B players achieve eye-catching yet reliable locking performance.
Function
Pull 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 spring pull pin locked with wrench in advance.
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
- M12 x 1.5
Thread Material
- Steel
Screw Length(mm/inch)
- 28 / 1.10
Plunger Diameter(mm)
- 6
Metal Finishing
- zinc plated with trivalent
External Diameter(mm)
- 25~28
External Height(mm)
- 21~24
External Material
- PA6+GF
External Shape
- Star
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Spring Pull Pin with Star Knob, M12 x 1.5 x 28mm, D27 | Achieve Ergonomic Efficiency with Adjustable Handles for Machinery
Based in Taiwan since 1994, UJEN DEVELOPMENT CO., LTD. expertise in manufacturing high-quality Spring Pull Pin with Star Knob, M12 x 1.5 x 28mm, D27, 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.