340PCS M3 ISO7380 Button Head Hex Socket Screws Nuts Kit SS304

340-Piece M3 ISO7380 Button Head Hex Socket Screw & Nut Assortment Kit – Stainless Steel SS304

Keep your projects moving with this comprehensive 340-piece M3 stainless steel fastener kit. Featuring ISO7380-compliant button head hex socket screws in nine different lengths plus matching M3 nuts, this all-in-one assortment is the perfect addition to any toolbox, workshop, or maker space. Crafted from durable SS304 stainless steel, every piece resists corrosion and stands up to demanding conditions — indoors or out.

Made in Mainland China.

What's in the Kit?

Key Features

• ISO7380 Standard: Button head hex socket design conforms to internationally recognised ISO7380 specifications for consistent, reliable fit.
• SS304 Stainless Steel: Superior corrosion resistance makes these screws suitable for electronics, woodworking, DIY projects, and light engineering tasks.
• Hex Socket Drive: Requires an Allen/hex key for a secure, cam-out-resistant drive — ideal for tight spaces where traditional screwdrivers can't reach.
• Nine Screw Lengths: From 5mm to 20mm, you'll have the right size on hand for almost every M3 application.
• 160 Matching Nuts Included: Plenty of M3 hex nuts to pair with every screw in the set.
• CE Certified: Meets European conformity standards for quality and safety.
• 100% New Components: Each piece is brand new and ready for immediate use.

Ideal Applications

• Electronics and PCB assembly
• 3D printer builds and repairs
• RC models and robotics
• Woodworking and furniture assembly
• General DIY and home improvement projects
• Workshop repairs and mechanical assembly

Specifications

• Brand: JARBLUE
• Material: Stainless Steel SS304
• Standard: ISO7380
• Thread Size: M3
• Drive Style: Hex Socket (Allen Key)
• Head Style: Button Head
• Total Pieces: 340
• Certification: CE

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Frequently Asked Questions

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

A: ISO7380 M3 button head hex socket screws typically require a 2mm hex (Allen) key. This is a standard size included in most Allen key sets. Always check your specific kit or a torque specification chart for confirmation.

Q: Are these screws suitable for outdoor use?

A: Yes. Made from SS304 stainless steel, these screws and nuts offer good corrosion resistance, making them suitable for both indoor and moderately exposed outdoor applications. For highly corrosive environments (e.g. saltwater exposure), SS316 grade would be recommended.

Q: What is the difference between ISO7380 button head screws and standard cap head screws?

A: ISO7380 button head screws have a low-profile, rounded head that sits closer to the surface, providing a cleaner, more streamlined look. Standard cap head (ISO4762) screws have a taller cylindrical head that allows for higher torque but protrudes more. Button heads are ideal when a flush, neat appearance matters.

Q: How are the screws and nuts stored in this kit?

A: The 340-piece assortment is packaged in a sorted format with each size kept together, making it easy to find the right screw quickly on the workbench or in storage.

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.