580 Pcs M3 M4 M5 Screws and Nuts Set Black Countersunk Phillips Flat Head Machine Screws with Washers Carbon Steel Assortment Kit

580 Pcs M3 M4 M5 Countersunk Screw Nut Washer Kit Black Carbon Steel Phillips Flat Head Assortment
✔️ 580 Pack Metric Screw Kit M3 M4 M5 Flat Head Bolts with Nuts and Washers

This 580 pack metric screw assortment includes M3, M4, and M5 countersunk flat head machine screws with matching nuts and washers, making it a handy solution for repairs, assembly, and maintenance work. Built from durable carbon steel with a black finish, this kit is ideal for home, automotive, and industrial use where flush mounting and secure fastening are needed.

✅ Pack size: 580 pieces total
✅ Sizes included: M3 M4 M5 screws with matching nuts and washers
✅ Material: high strength carbon steel
✅ Finish: black corrosion resistant coating
✅ Head type: Phillips flat head countersunk design
✅ Full thread design for strong and balanced fastening
✅ Clean precise threads for easy installation without stripping
✅ Ideal for appliances, furniture, automotive, machinery, and electronics

Size Breakdown

M3 x 6 mm     50 pcs
M3 x 8 mm     40 pcs
M3 x 10 mm    35 pcs
M3 x 12 mm    30 pcs
M3 Nuts       140 pcs

M4 x 8 mm     30 pcs
M4 x 10 mm    25 pcs
M4 x 12 mm    20 pcs
M4 x 16 mm    20 pcs
M4 Nuts       80 pcs

M5 x 10 mm    20 pcs
M5 x 12 mm    15 pcs
M5 x 16 mm    15 pcs
M5 x 20 mm    10 pcs
M5 Nuts       50 pcs

💡 Why use a countersunk flat head screw kit like this M3 M4 M5 assortment for mechanical and electrical assemblies?
Countersunk screws are designed to sit flush with the surface, improving both function and appearance.

• Creates a smooth surface with no protruding screw heads

• Provides better load distribution when paired with washers

• Reduces snagging in moving or tight clearance parts

• Ideal for precision assemblies where alignment and finish matter

A solid go to kit when you need organized sizes, strong fastening, and clean flush mounting across multiple projects.
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