Carriage Bolts Round Head Square Neck Screws A2 Stainless Steel M4 M5 M6 M8-M12

Carriage Bolts Round Head Square Neck Screws A2 Stainless Steel M4 M5 M6 M8-M12

‌🌟 Material Advantages‌

✅ ‌Food-Grade 304 Stainless Steel‌: 18% chromium + 8% nickel composition, surpassing ordinary steel in acid/alkali resistance and rust prevention. Passes  salt spray testing (1,000 hours rust-free).
✅ ‌High-Strength Deformation Resistance‌: Cold-forged for tensile strength ≥500 MPa, ensuring long-term load-bearing stability.
✅ ‌Non-Magnetic Safety‌: Weak magnetism suitable for precision instruments/medical devices (magnetic test reports included).
✅ ‌Polished Scratch-Resistant Finish‌: Brushed/mirror surfaces (optional) protect installed surfaces while enhancing aesthetics.

‌⚡ Performance Benefits‌

✔️ ‌Anti-Slip Mastery‌: Semi-round square neck design locks into place with zero rotation, even under intense vibration.
✔️ ‌3-Second Installation‌: Large dome head + square neck allows single-tool tightening, cutting assembly time by 50%.
✔️ ‌Universal Compatibility‌: Fits M6-M24 specifications, covering 99% of shelving/steel structure needs.
✔️ ‌Zero Maintenance‌: Naturally resistant to aging—performs flawlessly in humid workshops/outdoor environments for decades.

‌⚠️ Usage Tips‌

❌ ‌Avoid Overloading‌: Never exceed rated load capacity—overloading risks thread stripping.
🔧 ‌Installation Guide‌: Ensure square neck fits snugly into pre-drilled holes—adjust with a file or add washers as needed.
🌧️ ‌Environmental Limits‌: Upgrade to 316 stainless steel for chloride-rich environments (e.g., coastal areas).
🔩 ‌Electrochemical Protection‌: Use nylon washers when connecting to aluminum/galvanized steel to prevent galvanic corrosion.
📏 ‌Precision Measurement‌: Bolt length = total material thickness + 5 mm (thread engagement allowance).

‌🚀 Applications‌

🏭 ‌Industrial Storage‌: Warehouse racks, steel platforms, forklift lanes (ultra-high load capacity).
🛋️ ‌Furniture Assembly‌: Outdoor tables, wooden shelves, greenhouse frames (weatherproof durability).
🚢 ‌Marine/Automotive‌: Trailer chassis, ship decks, RV parts (salt spray resistance).
🔌 ‌Public Infrastructure‌: Bridge railings, subway signage, billboard mounts (municipal-grade certification).
🔧 ‌DIY Projects‌: Garage tool walls, backyard storage, treehouses (burr-free safety).

 

Product information:

Product Name: Round Head Square Neck Screws A2 Stainless Steel 

Material: 304 stainless steel

Measurement system: metric system

Size:M4 M5 M6 M8-M12 

Color: Silver

Length: 10mm-100mm
The thread is metric coarse thread (most common)

Package included: according to your choice. Select your requirements from the drop down menu above

Note: This Product Is Available in Different Dimensions and Can Be Customized to Your Specific Needs. (If the Size You Are Looking for Is Not Listed, Please Contact Us. We Are Happy to Help! )

 Tips: 

1.Due to computers display colors differently,the color may vary slightly from the above images,Thanks for your understanding!

2.Due to different manual measurement methods, the size may be slightly different, please understand!

3.You have any questions, please feel free to contact us, we will reply as soon as possible and help you solve!

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●For the functional products in our shop, we make sure that the functions are the same as the description.
●About the product colour:Because of the different light and environment when the product is photographed, In a few instances the colour of the product may have a little colour difference with the actual colour of the product, I hope you can understand.
 

On Aug 1, 2025 at 10:06:23 PDT, seller added the following information:

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