Products

12 Point Bolt – High-Strength Double Hex Fastener

The 12 Point Bolt (also known as Double Hex Bolt) is a premium-grade fastener engineered for demanding industrial applications requiring superior torque transmission and space efficiency. Featuring a 12-point (double hex) drive system with 30° between flats—compared to 60° on standard hex heads—this design allows for higher torque application with reduced wrench arc, enabling easier installation in confined spaces.

✔ Superior torque transmission and high vibration resistance
✔ Compact head design for confined space installation
✔ Flange head eliminates need for separate washers

Key Features & Advantages

• Higher Torque Capacity – 12-point drive system withstands significantly higher torque than standard hex bolts while minimizing cam-out and tool slippage

• Space-Saving Design – Smaller head diameter allows fastening in restricted spaces where standard hex sockets cannot fit

• Built-In Flange – Integrated flange distributes clamping force evenly, reduces surface pressure, and often eliminates the need for separate washers

• Superior Vibration Resistance – High torque capability combined with wide bearing surface dramatically improves resistance to vibration-induced loosening

• Reduced Tool Slippage – 12-point head geometry significantly reduces the chance of tool slippage during tightening

Material Grades & Applications

Surface finishes available include plain, zinc plating, black oxide, Dacromet, Xylan®, and hot-dip galvanizing.

⚙️ Quality Standards & Certifications

Our 12 Point Bolts are manufactured in strict compliance with international standards:

• IFI-115 – Industrial Fasteners Institute standard for 12-point flange bolts

• ASTM A574 – Standard Specification for Alloy Steel Socket Head Cap Screws

• ASME B18.2.5M – Metric 12-point flange head screws standard

• SAE J429 (Grades 5 & 8) – Mechanical and material requirements for externally threaded fasteners

• ISO 898-1 (Classes 8.8, 10.9, 12.9) – Mechanical properties of carbon/alloy steel fasteners

• RoHS Compliant – Environmentally compliant manufacturing

All bolts undergo rigorous quality control including dimensional checks, hardness testing, and thread consistency verification.

Industry Applications

• Automotive – Engine components, transmission systems, chassis assemblies, high-performance racing

• Heavy Machinery – Hydraulic systems, mining equipment, earth-moving machinery, industrial presses

• Aerospace – Engine mounts, landing gear, turbine assemblies requiring vibration resistance

• Energy Sector – Wind turbines, oil/gas drilling rigs, nuclear reactors

• Construction & Structural – Steel structure connections, bridge fastening, heavy-duty stamping applications

• Marine & Chemical Processing – Offshore platforms, desalination plants, chemical reactors

OEM & Customization Services

As a leading fastener manufacturer based in Shanghai, we offer comprehensive OEM and customization services to meet your exact specifications:

• Custom dimensions – Non-standard lengths and diameters

• Special thread patterns – UNC, UNF, Metric coarse/fine, custom pitches

• Surface treatments – Zinc plating, Dacromet, Xylan®, Geomet, black oxide, phosphating

• Packaging options – Bulk, boxed, or custom-labeled per buyer requirements

Our strategic location in Shanghai ensures efficient logistics and fast shipping to global destinations.

✅ Contact us today for a competitive quote on 12 Point Bolts — OEM and bulk orders welcome