Small Indexing Plunger with Circle Plastic Clamping Knob, M8 x 1.0 x 20mm, D21, pin4 | Achieve Ergonomic Efficiency with Adjustable Handles for Machinery
Perfect for lab instruments, this mini plunger keeps calibrations secure. For mini machinery using screws or knobs, precise locking and appealing design matter. Our compact plungers cover M8–M16, with 4–10mm pin specs. This knob includes a ring and four shape variations, plus 7 color discs/rings for customization. Taiwan CNC and mold manufacturing guarantee accurate tolerances and durability, with wood fiber or oyster shell plastic for eco aims. ISO9001-compliant, we handle high-volume or bespoke B2B orders in medical, automotive, sports, and semiconductor fields. UJEN is an ISO 9001 certification Small Indexing Plunger with Circle Plastic Clamping Knob, M8 x 1.0 x 20mm, D21, pin4, Spring loaded pull pin, 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.
Small Indexing Plunger with Circle Plastic Clamping Knob, M8 x 1.0 x 20mm, D21, pin4
PSK300-2108200406
Spring loaded pull pin, Indexing plunger, Pop pin
Perfect for lab instruments, this mini plunger keeps calibrations secure. For mini machinery using screws or knobs, precise locking and appealing design matter. Our compact plungers cover M8–M16, with 4–10mm pin specs. This knob includes a ring and four shape variations, plus 7 color discs/rings for customization. Taiwan CNC and mold manufacturing guarantee accurate tolerances and durability, with wood fiber or oyster shell plastic for eco aims. ISO9001-compliant, we handle high-volume or bespoke B2B orders in medical, automotive, sports, and semiconductor fields.
Function
UJEN Mini Spring Pull Pins are ideal for applications requiring compact size, frequent adjustment, and quick fastening. Simply pull the compact knob upward to release the pin from its hole, adjust the component to your desired position, and release—the internal spring immediately re-engages the pin for precise positioning.
Additionally, this pull pin features a special knob design allowing manual rotation to tighten screws directly by hand, ensuring stable clamping and preventing component vibration or loosening without needing tools. Perfectly suited for fitness equipment, medical devices, mechanical assemblies, and furniture hardware.
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)
- 20 / 0.79
Plunger Diameter(mm)
- 4
Metal Finishing
- zinc plated with trivalent
External Diameter(mm)
- 21~24
External Height(mm)
- 21~24
External Material
- PA6+GF
External Shape
- Circle
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
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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...
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Small Indexing Plunger with Circle Plastic Clamping Knob, M8 x 1.0 x 20mm, D21, pin4 | 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, M8 x 1.0 x 20mm, D21, pin4, 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.