Heavy Duty 12.9 Grade Carbon Steel Set Screw Assortment Kit With 200 Anti Rust Grub Screws In Eight Sizes For Tough As Nails Machinery Jobs And Weekend Warrior Builds

Heavy duty M3 set screw kit for industrial machinery builds
✔️ 200 assorted 12.9 carbon steel grub screws black oxide finish

You get a full pack of two hundred hex head bolts ready for tight mechanical work. These M3 grub screws lock pulleys gears and shafts securely in place. You will find them handy on custom fabrication projects and home workshop repairs.

✅ Made from hardened 12.9 grade carbon steel for serious load bearing tasks
✅ Black oxidation coating stops rust and keeps working surfaces clean
✅ Covers thread pitches from three to fourteen millimeters for common hardware slots
✅ Hex drive accepts standard wrenches so you can turn them fast without stripping

💡 What makes a heavy duty set screw reliable for constant vibration?
- The high tensile strength of twelve point nine grade steel holds fast under torque and shock.
- The black oxide layer resists moisture and wear so the threads stay clean after many removals.
- Precision sizing across four millimeter ranges guarantees a snug fit inside small machinery housings.

✝️