Stainless Steel Non Lock-Out Knob Plunger Pin M2×3 – 4 Pack

Meet the Stainless Steel Non Lock-Out Knob Plunger (M2×3) — a compact, reliable indexing plunger pin engineered for precise positioning and smooth, repeatable adjustment across a wide range of mechanical and industrial applications.

Constructed from durable stainless steel, this spring-loaded plunger features an easy-grip knob and a convenient pull ring for effortless operation with one hand. The non lock-out design means the pin automatically retracts when the ring is pulled and re-engages the moment you release — no extra steps, no fumbling, no missed positions.

Key Features

• Material: Corrosion-resistant stainless steel for long-lasting durability
• Thread Size: M2×3 — a versatile metric size suited to light-duty machinery, fixtures, and equipment
• Non Lock-Out Design: Spring tension automatically re-engages the pin upon release
• Pull Ring: Enables convenient single-handed retraction
• Easy-Clean Finish: Stainless steel resists rust and wipes clean in seconds
• Pack of 4: Includes four plungers so you can outfit multiple positions or keep spares on hand

Ideal Applications

• Furniture assembly jigs and fixtures
• Light industrial machinery and equipment panels
• Tooling and workholding setups
• DIY projects requiring precise, repeatable positioning
• Robotics and automation frames

Whether you are a hobbyist builder or a professional technician, these spring plunger pins deliver consistent, dependable indexing performance day after day. The corrosion-resistant stainless steel construction means they hold up in workshop environments where moisture and wear are a concern.

Note: Due to variations between monitor displays, the actual color of the product may differ slightly from images shown.

For more information on fastener and hardware standards, visit the NIST Manufacturing Engineering Division.

Frequently Asked Questions

Q: What is a non lock-out knob plunger and how does it work?

A: A non lock-out knob plunger is a spring-loaded indexing pin that automatically re-engages its spring-loaded tip as soon as you release the pull ring. Unlike lock-out versions that stay retracted until manually reset, the non lock-out style snaps back into position instantly — making it ideal for applications where quick, repeatable positioning is needed without extra manual steps.

Q: What thread size is this stainless steel plunger pin?

A: This plunger pin features an M2×3 metric thread, making it compatible with standard M2 tapped holes. It is well suited to light-duty machinery, fixtures, tooling setups, and DIY applications that require this metric sizing.

Q: How many plungers are included, and what material are they made from?

A: This listing includes a set of 4 plunger pins, all constructed from corrosion-resistant stainless steel. The stainless steel build ensures durability, easy cleaning, and resistance to rust — keeping each pin performing reliably over extended daily use.

Q: What is the advantage of stainless steel over other materials for plunger pins?

A: Stainless steel offers superior corrosion resistance compared to carbon steel or zinc-plated alternatives, making it ideal for workshop, industrial, or outdoor environments where exposure to moisture, oils, or cleaning agents is common. It also maintains structural integrity under repeated spring compression cycles.