M3–M16 A2-70 304 Stainless Steel Hex Socket Allen Spring Ball Plunger Set Screw Grub Bolt

M3–M16 A2-70 304 Stainless Steel Hex Socket Allen Spring Ball Plunger Set Screw Grub Bolt

A2-70 grade 304 stainless steel spring ball plunger set screws (grub bolts) with hex socket Allen drive. The spring-loaded ball tip provides a positive detent action — ideal for indexing, positioning, and locking mechanisms where repeatable, tool-free engagement is required. Corrosion-resistant 304 stainless steel suits humid, outdoor, and food-adjacent environments.

Key Specifications

Why Choose Spring Ball Plunger Set Screws?

• Spring-loaded ball tip — provides positive detent action for indexing and positioning without tools
• A2-70 304 stainless steel — corrosion-resistant for humid, outdoor, and food-processing environments
• Hex socket drive — high torque installation with standard Allen keys; no cam-out
• M3–M16 range — covers light electronics to heavy industrial positioning applications
• Reusable — spring mechanism maintains consistent detent force over repeated cycles

Typical Applications

• Indexing and detent positioning in jigs and fixtures
• Rotary table and turret indexing mechanisms
• Drawer and cabinet latch mechanisms
• CNC machine tool holder retention
• 3D printer filament runout sensor mounting
• Optical and precision instrument positioning

Compatible With

Standard metric tapped holes M3–M16. Allen key sizes: M3=1.5mm, M4=2mm, M5=2.5mm, M6=3mm, M8=4mm, M10=5mm, M12=6mm, M16=8mm.

FAQ

Q: What is a spring ball plunger set screw?
A: A spring ball plunger set screw has a spring-loaded ball bearing at the tip instead of a flat, cone, or cup point. When the screw is installed in a tapped hole, the ball protrudes and engages a detent groove or hole in a mating part, providing a positive but releasable locking action.

Q: What Allen key size do I need for M6?
A: M6 spring ball plunger set screws use a 3mm hex (Allen) key.

Package Contents

• M3–M16 A2-70 304 SS spring ball plunger set screws (quantity and size per selected variant)