Flange Bolts – Integrated Washer Head Bolts for High Clamping Force & Load Distribution
Product Description
Flange Bolts are specialized fasteners featuring a built-in circular flange beneath the bolt head, which acts as a washer to distribute the load and prevent damage to the connected surfaces. This design eliminates the need for a separate washer and ensures even pressure distribution, increased bearing surface, and resistance to loosening under vibration.
At SM Fasteners, we manufacture precision-engineered flange bolts compliant with DIN 6921, ISO 1665, and JIS B1189 standards. Available in grades 8.8, 10.9, and 12.9, these bolts are made from high tensile carbon steel, stainless steel (304/316), and mild steel, with surface treatments for corrosion resistance.
Applications
Flange bolts are widely used in assemblies where high strength and even torque distribution are critical. Their flange design improves reliability and eliminates the risk of washer displacement during vibration or torque load.
Common Applications:
Automotive engine and chassis systems
Heavy machinery and construction equipment
Gearbox housings and mechanical joints
Sheet metal assembly
Pumps, compressors, and hydraulic systems
Steel fabrication and agricultural machinery
Technical Specifications
| Parameter | Details |
|---|---|
| Product Type | Flange Bolts |
| Thread Type | Full / Partial Threaded |
| Head Style | Hex Head with Integrated Flange (Smooth or Serrated) |
| Standards | DIN 6921, ISO 1665, JIS B1189 |
| Grades | 8.8, 10.9, 12.9 |
| Material | High Tensile Steel, Stainless Steel 304/316, Mild Steel |
| Finish | Zinc Plated, Black Oxide, Hot Dip Galvanized, Passivated |
| Size Range | M6 to M24 / 1/4” to 1” |
Why Choose Our Flange Bolts?
At SM Fasteners, we prioritize strength, reliability, and long-term performance in demanding industrial conditions.
✅ Built-in Washer Design – Eliminates need for washers, improves speed of assembly
✅ Anti-Loosening Serrations – Prevent self-loosening in vibration-heavy environments
✅ Precision Threading – Ensures tight, uniform clamping and easy torque control
✅ Custom Lengths & Surface Finishes – Ready for high-corrosion or high-heat areas
✅ Compliance with Global Standards – DIN, ISO, and JIS certified
✅ Bulk Availability with Quick Dispatch
Packaging and Delivery
We ensure robust packaging and reliable dispatch methods for all types and grades of flange bolts. Packaging is tailored based on quantity, material, and destination.
Packaging Options:
Individual poly-packed (for stainless steel)
Gunny bags or corrugated boxes for bulk
HDPE sacks or shrink-wrapped wooden pallets for exports
Custom-printed cartons with SM Fasteners & “Made in India” labelling
Industries We Serve
Our flange bolts are widely used across industries that demand secure, vibration-resistant fastening and minimal maintenance:
Automotive & Transport Industry
Earthmoving & Heavy Construction Equipment
Industrial Machinery & Gear Assemblies
Agriculture & Farming Equipment
Steel Fabrication & Infrastructure Projects
Energy, Oil & Gas Equipment Manufacturing
Pumps, Compressors, and Hydraulic Systems
Documents Supplied
With every order, we provide comprehensive certification and documentation, ensuring full traceability and quality assurance:
Mill Test Certificate (MTC)
Material Composition Report
Dimensional Accuracy Report
Heat Number Stamping (on request)
Third-Party Inspection (available)
Country of Origin – India Declaration
Request a Quotation
For project pricing, OEM supply, or urgent delivery, get in touch with our technical team.
📧 Email: susheel@smfastners.com
📞 Call: +91 8968469570
💬 WhatsApp Chat: Click to Chat
⚙️ SM Fasteners – Trusted by Engineers. Preferred by Industries.