Heavy Duty Ball Point Set Screws M4 X 16mm High Carbon Steel Metric Spring Grub Screws 10 Pack Hex Socket Locking Fasteners With A Rock Solid Grip And Zero Slack For Tough Jobs That Need Reliable Hold Power

Heavy Duty M4x16mm Spring Grub Screws for Machine Fixtures
✔️ M4 Metric Thread High Carbon Steel 10 Pack Hex Locking Fasteners

You receive a ten count pack of robust M4 set screws built for industrial assembly tasks. These compact fasteners hide flush inside equipment frames so nothing catches on moving parts. They absorb uneven weight and keep jigs perfectly aligned during tough operations.

✅ Thread measures M4 millimeter and 0.16 inch diameter for standard clearance holes
✅ Length runs 16 millimeter and 0.63 inch overall for deep seat engagement
✅ Hex socket head allows steady torque transfer without stripping or rounding off
✅ Integrated coil spring absorbs vibration while the sliding ball eases quick tweaks
✅ Concealed profile mounts directly against flat metal or plastic work piece edges

💡 What makes spring grubs screws handy for securing loose mechanical joints?

These locking fasteners apply constant radial pressure to stop wobbly components from drifting.

- High carbon steel core resists dulling and keeps a firm bite under heavy shaking
- Compact cylindrical shape slides past obstacles and stays fully recessed during use
- Flexible internal spring balances outward push and prevents damaging scratch marks

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