600Pcs M3 Stainless Steel Hex Socket Button Head Screws Nuts Kit

600-Piece M3 Stainless Steel Hex Socket Button Head Screw & Nut Assortment Kit

Keep your workshop, electronics bench, or DIY projects fully stocked with this comprehensive 600-piece M3 fastener assortment. Featuring 304 stainless steel construction, these button head hex socket screws and matching nuts deliver lasting durability, corrosion resistance, and a clean, low-profile finish — perfect for everything from RC models and 3D printers to woodworking jigs and electronics enclosures.

Everything arrives neatly sorted in a reusable organizer box, so you can find the right size instantly and keep your workspace tidy. Made in Mainland China.

What's in the Box

• 300 Screws — 304 Stainless Steel, Button Head Hex Socket (Allen Drive)
• M3 × 6 mm — 50 pcs
• M3 × 8 mm — 50 pcs
• M3 × 10 mm — 50 pcs
• M3 × 12 mm — 50 pcs
• M3 × 16 mm — 50 pcs
• M3 × 20 mm — 50 pcs
• 300 Hex Nuts — M3, 304 Stainless Steel
• 1 Reusable Organizer Box — labelled compartments for quick access

Key Features

• 304 Stainless Steel — naturally rust- and corrosion-resistant for indoor and light outdoor use
• Button Head Profile — sleek, rounded dome head sits flush and looks professional on exposed surfaces
• Hex Socket (Allen Key) Drive — high torque transfer with minimal cam-out; works with any standard 2 mm hex key or hex bit
• 6 Screw Lengths (6–20 mm) — a versatile range covering the most common M3 applications in one kit
• 600-Piece Assortment — 300 screws + 300 matching nuts; always have the right fastener on hand
• Sorted Storage Box — keeps every size separated and labelled so you spend time building, not searching

Ideal Applications

• 3D printer frames and accessories
• RC cars, drones, and robotics
• Electronics enclosures and PCB mounting
• Woodworking jigs and fixtures
• DIY furniture assembly and home repairs
• Prototyping and maker projects

Specifications

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Frequently Asked Questions

Q: What Allen key size do I need for these M3 button head hex socket screws?

A: M3 button head hex socket screws use a 2 mm hex key (Allen key). Most standard hex key sets and hex bit driver sets include this size. The hex socket drive provides excellent torque and reduces the chance of cam-out compared to Phillips or slotted drives.

Q: Are these screws suitable for outdoor use?

A: The screws and nuts are made from 304 stainless steel, which offers good corrosion resistance for light outdoor or damp indoor environments. For continuous heavy-duty outdoor or marine exposure, 316 stainless steel is recommended. For typical indoor workshops, electronics, and hobby projects these fasteners provide excellent longevity.

Q: How are the pieces organized inside the box?

A: The kit includes a reusable organizer box with individual labeled compartments for each screw length and the M3 nuts. This makes it easy to locate the right size quickly and store leftover fasteners neatly after your project is complete.

Q: Can I use these screws in a 3D printer or robotics project?

A: Absolutely. M3 button head hex socket screws are among the most commonly used fasteners in 3D printers, CNC machines, robotics, RC models, and electronics enclosures. The 6-length variety (6 mm to 20 mm) and 300 included nuts make this kit especially well-suited for those builds.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.