Warning Spring Pull Pin with Circle Clamping Knob, M16 x 40mm, D65, pin10
PWK100-651640N1013
Safety pull pin, Indexing plunger, Locking pop pin
Alert visuals highlight the pin’s locked or unlocked state, ensuring proper usage. Warning pull pin comes with a reminder function and is metal-coated with trivalent white zinc for stable corrosion resistance. When the center pin is not properly inserted, the color circle at the top rises to alert the user. The metal parts are made by a CNC lathe, reducing wobble and increasing the load capacity of the 10mm center pin. The threads are M16x40mm, compliant with Grade 2 threads. The hand-pulled part can be used as a circle knob to drive the screw for fastening the workpiece. This part is made of high-tenacity nylon reinforced material, designed from a mold by UJEN. We also offer heat resistant clamping knobs for specialized applications. No scratching, no sharp corners, no burrs, and overall compliance with RoHS, REACH, SGS.
Function of Heat-Resistant Clamping Knobs
The safety pull pin is ideal for quickly securing parts, especially when the pins need to be frequently removed and relocked. Pulling up the knob causes the pin to also be pulled, enabling users to swiftly adjust the expansion tubing. After releasing the knob, reinsert it. If not properly placed back into the hole, the color circle on the knob's top will reveal an orange ring from the screw as a reminder to the user. This pull pin can clamp the tubing when tightened by hand, eliminating the need for any tools.
Function
UJEN Safety Indexing Pins (Spring Pull Pins) are designed specifically for frequent repositioning and quick fastening of components. Simply pull the top knob to quickly disengage the pin, adjust the component, and release—the built-in spring immediately returns the pin into its positioning hole for precise re-engagement.
Featuring an innovative visual safety indicator, if the pin is not properly reinserted, a colored indicator on top of the knob pops up, and an orange warning ring around the screw becomes visible, instantly alerting the user to the improper engagement for prompt correction.
Additionally, this safety indexing pin allows manual rotation of the knob for convenient hand-tightening of components, securely preventing vibration and loosening without additional tools. Ideal for fitness equipment, medical devices, industrial machinery, furniture hardware, and beyond, UJEN Safety Pins ensure secure, reliable fastening with added safety assurance.
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)
- 40 / 1.57
Plunger Diameter(mm)
- 10
Metal Finishing
- zinc plated with trivalent
External Diameter(mm)
- 65~68
External Height(mm)
- 45~48
External Material
- PA6+GF
External Shape
- Circle
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Warning Spring Pull Pin with Circle Clamping Knob, M16 x 40mm, D65, pin10 | Achieve Ergonomic Efficiency with Adjustable Handles for Machinery
Based in Taiwan since 1994, UJEN DEVELOPMENT CO., LTD. expertise in manufacturing high-quality Warning Spring Pull Pin with Circle Clamping Knob, M16 x 40mm, D65, pin10, 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.