540-Piece M3 Hex Socket Cap Screws Kit with Nuts & Washers
✔️ 7 M3 lengths, 12.9 grade alloy steel, black oxide finish

This beefy hardware set includes M3 hex socket cap screws in 7 lengths, matching nuts, lock washers, and flat washers. Packed in a durable transparent box for easy size selection and organized storage, it's ideal for precision projects, electronics, home appliances, and hobby builds.

✅ Includes M3x6mm, M3x8mm, M3x12mm, M3x16mm, M3x20mm, M3x25mm, M3x30mm screws, plus nuts, lock washers, flat washers
✅ 12.9 grade alloy steel with black oxide finish for high hardness and corrosion resistance
✅ Nuts, lock washers, and flat washers included to distribute load and protect threads
✅ Transparent storage box keeps parts organized for quick selection
✅ Wide applications in precision machinery, electronics, appliances, locks, lamps, and toys
✅ CHOKING HAZARD, small parts; keep away from children

💡 What is the best way to choose M3 hex socket head cap screws for project assemblies? A quick, practical guide to picking the right size, material, and finish for consistent results. - M3 hex socket head screws in 6-30 mm lengths used in metal and plastic assemblies - 12.9 grade alloy steel with black oxide finish for strength and corrosion resistance - Nuts, lock washers, and flat washers included to improve grip and load distribution