Spring Pull Pin with Star Knob, M16 x 35mm, D38
PNK170-381635N0808
Spring loaded pull pin, Indexing plunger, Pop pin
Simplify multi-stage operations with a spring-loaded indexing plunger that never falters. Upgrading your screws (or bolts) with a distinctive handle? Our pull knob might be the missing piece: four head styles—concave, flat, convex, dotted—and a 7-shade color ring plus color disc array for personalized aesthetics. Our CNC lathe process and mold expertise in Taiwan guarantee durable precision, and eco-friendly blends with oyster shell or wood fiber reduce plastic consumption. Meanwhile, an ergonomic design minimizes wrist strain during repeated locking. With ISO9001 certification, we deliver consistent quality for both large-scale orders and specialized customization. From medical gear and sports devices to automotive, aerospace, and specialized machinery, Our pull knob merges functionality with eye-catching design for the B2B realm.
Function
UJEN Spring Pull Pins are ideal for applications requiring frequent adjustment and quick fastening. Simply pull the top knob to disengage the indexing pin, adjust components to the desired position, and release the knob—built-in spring action automatically reinserts the pin for secure, accurate positioning.
UJEN Spring Pull Pins feature a threaded locking design, allowing you to pre-tighten the pin using a wrench for enhanced stability. Widely used across industries including fitness equipment, medical devices, industrial machinery, and furniture hardware, UJEN pull pins improve your product's competitiveness and ease of use.
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
Thread Material
- Steel
Screw Length(mm/inch)
- 35 / 1.38
Plunger Diameter(mm)
- 8
Metal Finishing
- zinc plated with trivalent
External Diameter(mm)
- 37~40
External Height(mm)
- 29~32
External Material
- PA6+GF
External Shape
- Star
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Spring Pull Pin with Star Knob, M16 x 35mm, D38 | 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, M16 x 35mm, D38, 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.