Sixty Piece M4 X 40mm Hex Socket Cap Screws Engineered From Bulletproof 12.9 Grade Black Oxide Steel Featuring Full Threads And An Included Allen Key For Zero Drama Builds And Badass Torque Wherever You Go

60 Pack M4x40mm Hex Head Bolts Black Oxide Steel Fasteners
✔️ M4 x 40mm black oxide steel hex socket screws pack of 60

get your projects built right with this value pack of 60 m4 hex socket cap screws. these heavy duty fasteners give you serious torque for drone frames garage gear and bike mods. the 12 9 grade steel holds up under stress so you can tighten with confidence.

✅ Sixty full thread bolts in one convenient pack for quick repairs
✅ M4 x 40mm size with deep engagement for secure mechanical builds
✅ 12 9 grade alloy steel delivers high hardness and strength
✅ Black oxide coating resists rust while improving grip performance
✅ Includes hex spanner tool for fast setup and zero drama installs

💡 What makes 12 9 grade m4 hex socket cap screws handy for mounting sensitive electronics and metal assemblies?
You get reliable clamping force without stripping heads during assembly.

- Pair thick washers to spread load stress across aluminum plates and keep joints tight.
- Add nylon insert nuts to lock fasteners against engine vibration and rattling noises.
- Coat threads lightly with graphite powder when driving stubborn bolts into tight holes.

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