Spring Pull Pin with Star Knob, M16 x 1.5 x 26mm, D38
PNK170-3816260808
Spring loaded pull pin, Indexing plunger, Pop pin
A user-focused index plunger design providing clear tactile feedback on locking. If your pins or center pillars lack a distinctive handle, Our pull knob presents four head variants—concave, flat, convex, dotted—and color ring plus color disc sets (7 shades each) to elevate product identity. Taiwan-based CNC lathe and mold integration secures stable precision, while eco-minded users can pick knob plastics containing oyster shell or wood fiber. Ergonomic shaping lowers repetitive fatigue, and ISO9001 procedures maintain quality in large or custom orders. This knob suits medical devices, sports machines, automotive lines, or semiconductor gear, boosting efficiency in multi-position locking. By merging function with aesthetics, UJEN helps B2B firms stand out.
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 x 1.5
Thread Material
- Steel
Screw Length(mm/inch)
- 26 / 1.02
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
Gallery
- Customized service for Bolt, Screw & Nut (metal parts)
- The center pin can be fitted with an anti-scratch pad to minimize scratches on the surface of the locked object.
- Optional accessories of knobs, handles, pull pins
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Details Add to List- FAQ
Does UJEN offer thumb screw samples for evaluation?
Yes, we are more than happy to provide knob screw samples for clients to evaluate and test. We believe that actual product experience can help clients...
How can UJEN ensure its handle screw nuts meet our environmental requirements?
We understand the importance of environmental protection for our clients and society. All UJEN's handle screw nuts strictly adhere to international environmental...
If our requirements change, can UJEN flexibly adjust the order?
We understand that market demands can change, so our production and logistics systems are designed with enough flexibility to accommodate changes in customer...
How does UJEN ensure the continuous innovation and development of new knob screws?
We have a dedicated R&D team responsible for the innovation and development of new knob screws. By continuously exploring the latest technological trends,...
What long-term value does partnering with UJEN offer?
Partnering with UJEN means not only obtaining high-quality spring plungers and other hardware accessories but also represents a long-term partnership....
Are UJEN's hand knob screws and indexing plungers manufactured in Taiwan?
All our handle screws and spring plungers are manufactured in Taiwan. UJEN is committed to local production, which not only supports Taiwan's economic...
Spring Pull Pin with Star Knob, M16 x 1.5 x 26mm, D38 | Custom Hand Screws, Knobs & Handles Manufacturer | UJEN
UJEN's tool-free fastening solutions and custom adjustable handles are specifically designed for fitness equipment requiring frequent user adjustments. Our 45-year expertise in hand screw manufacturing ensures reliable, comfortable, and aesthetically pleasing products that enhance your equipment's market appeal. Contact us for customized solutions that streamline your production process.
UJEN's core strength lies in transforming customer concepts into market-ready products through innovative design-to-production services, technical consulting, and engineering solutions. Our tool-free fastening innovations and customization capabilities enable manufacturers to differentiate their products while reducing assembly time and improving end-user experience. Partner with UJEN to elevate your product competitiveness with premium hand screws and custom knob solutions backed by four decades of manufacturing excellence and commitment to quality craftsmanship.









