A complete, organized starter kit of the most-used metric screws, nuts, and washers with matching hex keys included.

This set is built for makers, 3D-printing enthusiasts, electronics builders, and anyone who wants a reliable selection of M3 and M4 hardware always on hand. Everything is sorted into a durable, reusable box so you can build, refill, and stay organized.

What’s Inside

Cylindrical Hex Screws – M4 (HEX 3 mm)

• 50 pcs – M4 × 12 mm
• 50 pcs – M4 × 8 mm

Cylindrical Hex Screws – M3 (HEX 2.5 mm)

• 50 pcs – M3 × 6 mm
• 50 pcs – M3 × 10 mm

Washers

• 100 pcs – M3 Washers (D = 7 mm, h = 0.5 mm)
• 100 pcs – M4 Washers (D = 9 mm, h = 0.8 mm)

Nuts

• 100 pcs – M3 Nuts (H = 2.4 mm)
• 100 pcs – M4 Nuts (H = 3.2 mm)

Included Tools

• 1× Hex Key – 3 mm, length 63 mm
• 1× Hex Key – 2.5 mm, length 56 mm

Matching perfectly with all screws in the set.

Why This Kit Is Useful

• Covers the most common sizes used in electronics, robotics, 3D printing, mounts, brackets, and general hardware tasks

• Cleanly sorted for fast assembly

• High quantity for long-term use

• Includes the exact tools needed — no searching for matching keys

• Packed in a reusable organizer box for an always-ready workshop setup