Heavy Duty M3 X 55mm Socket Head Cap Screws 12.9 Grade Alloy Steel Hex Bolts With Black Oxide Finish Tough As Nails Hardware Pack For Automotive And Pro Garage Builds
✔️ 12.9 grade alloy steel fasteners black oxide coated pack of 50
This set delivers fifty precision cut M3 socket head cap screws built for high stress mounting tasks requiring firm torque retention. Mechanics grab these hex drive rods for chassis reinforcement, motor mounts, and rigid bracket setups where standard hardware falls short.
✅ 12.9 grade alloy steel construction rated for maximum shear resistance✅ M3 thread pitch 0.5mm or 0.02 inches UNC partially threaded design provides secure grip
✅ Head diameter spans 5.5mm or 0.22 inches with 3mm or 0.12 inches height
✅ Under head shaft extends 55mm or 2.2 inches alongside 58mm or 2.3 inches total length
✅ Precision hex socket width measures 2.5mm or 0.10 inches for standard Allen wrenches
✅ Black oxide coating shields raw steel from grease and humidity exposure
✅ Shipping weight registers around 151g or 5.3 ounces per fifty piece bundle
💡 What are high tensile socket head cap screws used for in custom vehicle builds
These upgraded fasteners deliver unmatched clamping strength when securing moving parts on factory frames.
- Thicker hex drives bite better and quit stripping during heavy cranking sessions
- Black oxide treatments stop highway grime and brake dust from eating through finishes
- Stashing extra lengths in the toolbox stays handy for sudden frame rail modifications
- Standard M3 cuts slide right into aluminum engine bays and steel roll cage nuts