Plastic Knob Plunger, 0.63 In, 3/8-16, 0.28

Description

A compact, manual spring-loaded plunger optimized for indexing, positioning, or fixture holding. The plastic knob design enables quick, tool-free retraction and release of the plunger tip, making it ideal for applications requiring frequent adjustments.

Key Specifications & Features

• Model / Part Number: GP6C-SK3-21 (Innovative Components)
• Knob / Grip Length: 0.63 in
• Thread Size: 3/8-16 (UNC)
• Tip / Plunger Projection: 0.28 in (nominal)
• Body Material: Steel
• Finish: Zinc plated
• Plunger Diameter: ~ ¼ in (0.25 in)
• Handle / Knob Type: Plastic knob (easy grip, manual operation)
• Style: Non-locking knob plunger (does not lock in the retracted position)
• Typical Use: Indexing, positioning, or quick-release applications in jigs, fixtures, or assemblies
• Country of Origin: Taiwan

Advantages & Ideal Applications

• Tool-Free Retraction & Release
  The plastic knob allows users to retract the plunger tip easily by hand and release it to engage, enabling fast adjustments or repositioning without tools.
• Compact & Discreet Footprint
  With a grip length of 0.63 in and a modest profile, it’s suitable for tight spaces or low-profile installations.
• Durable Construction
  The steel body with zinc plating offers strength and corrosion resistance, making it suitable for workshop and industrial environments.
• Non-Locking Simplicity
  Since this version is non-locking, it's ideal when you want smooth and unimpeded plunger operation—no twist-to-lock mechanism complicating engagement.
• Versatile Use Cases
  Common in fixtures, modular tooling, assembly jigs, or any application where rapid engagement and disengagement of a locating pin is needed.

Installation & Usage Tips

1. Thread Engagement: Ensure the 3/8-16 thread is fully engaged into your fixture or housing. Use thread sealant or locking compound if vibration is present.
2. Knob Operation: Pull back the plastic knob to retract the plunger; release to allow the spring to push it back into position.
3. Avoid Overextension: Do not force the plunger beyond its normal travel range to prevent internal spring damage.
4. Maintain Cleanliness: Keep debris, chips, or grit away from the plunger path to ensure smooth movement and avoid jamming.
5. Lubrication: Light lubrication on the plunger shaft can improve longevity in dusty or abrasive environments (use a compatible light oil).