560 Pc M3 To M20 Countersunk Socket Cap Screws Kit With Hex Nuts, Lock Washers And Flat Washers, 10.9 Grade Black Alloy Steel, Full Threaded, Heavy Duty Multi Size Set For Auto, Machinery, And DIY Projects

Heavy-Duty M3 to M20 Countersunk Socket Screws Kit 560pc
✔️ 7 sizes M3 5-20mm with nuts, lock & flat washers, black oxide finish

This 560-piece kit combines seven M3 to M20 countersunk socket cap screws with hex nuts, lock washers, and flat washers. It’s a handy all-in-one solution for automotive, machinery, electronics, and DIY projects that need secure flush mounting.

✅ Seven M3 to M20 countersunk socket cap screws with matching hex nuts, lock washers, and flat washers
✅ 10.9 grade alloy steel with black oxide finish for high hardness and corrosion resistance
✅ Internal hex drive enables flush mounting and reliable torque
✅ Labeled storage box for easy size selection and quick access
✅ 560-piece set covers a wide range of projects and assemblies

💡 What is a countersunk socket cap screw set used for in mechanical assemblies?

Handy for secure flush fastenings in panels, enclosures, and chassis.

- Provides flush mounting with a low-profile countersunk head for clean finishes
- Includes nuts, lock washers, and flat washers to distribute load and prevent pull-out
- Made from 10.9 grade alloy steel with black oxide for durability and corrosion resistance
- Pack includes 560 pieces for ready replacements and multiple projects