20 Pieces M4 X 25mm Knurled Thumb Screws Black Steel Flat Head Knurled Bolts With Shoulder Grip Knobs Hand Tighten Thread Fasteners For Lighting Fixtures Lamps Furniture Electronics Home Appliances And DIY Projects Grab And Go Ready

20-Pack M4 Knurled Thumb Screws for Tool-Free Tightening
✔️ M4x25mm knurled thumb screws, 12mm head dia, 0.7mm pitch, black zinc

These knurled thumb screws are hand-tight fasteners designed for quick, tool-free adjustments in lighting fixtures, lampshades, furniture, appliances, electronics, and DIY projects. They feature a flat head with a textured knurled grip for secure, flush mounting in tight spaces.

✅ Thread size: M4 x 25 mm, pitch 0.7 mm (0.03")
✅ Head diameter: 12 mm (0.47"), head thickness: 8 mm (0.31")
✅ Material: carbon steel with black zinc plating for corrosion resistance
✅ Shoulder head provides larger contact surface for easier tightening
✅ Pack: 20 pieces in a single pack

💡 What is a knurled thumb screw used for in home repairs and hobby projects?

It’s a handy fastener for quick setup without tools. - Handy for quick grip in tight spaces - Ideal for lighting fixtures, furniture, electronics - Black zinc plating resists corrosion - M4 size ensures broad compatibility