Buy Hex Head Flanged Bolts Online in Australia
Hex Head Flanged Bolts — Flange Head Bolts for Vibration Applications
Hex head flanged bolts combine a hex head with an integral flange that functions as a built-in washer — eliminating a separate washer component and providing load distribution and (in the serrated variant) vibration resistance in a single fastener. AIMS Industrial sells hex head flange bolts in metric Grade 8.8 for automotive, agricultural machinery, and structural fastening applications.
Hex Head Flanged Bolts We Stock
- Non-Serrated Flange Bolts: Smooth-flange hex bolts for applications requiring a washer face without the anti-rotation function of serrations — preferred on finished, coated, or anodised surfaces where serrations would damage the surface treatment.
- Serrated Flange Bolts: Serrated (toothed) flange bolts bite into the mating surface at first tightening, providing a vibration-resistant fastener that reduces the risk of loosening without a separate lock washer. Widely used in automotive assemblies, agricultural machinery, and vibration-loaded plant.
- Grade 8.8 Alloy Steel: Metric Grade 8.8 alloy steel hex flange bolts — the standard strength class for automotive and machinery applications. Grade 10.9 variants available for higher-load applications.
- Metric Range M6 to M16: Hex head flange bolts in the most commonly required metric sizes for automotive, machinery guarding, and enclosure fastening.
Flange Bolt Application Guide
- One-Piece Assembly Advantage: Replacing a bolt + washer assembly with a flanged bolt reduces part count, simplifies assembly, and eliminates the risk of the washer spinning or falling during installation in hard-to-access locations — a significant benefit in high-production assembly and maintenance operations.
- Serrated Flange Locking — One-Time Use: Serrated flange bolts are most effective on first installation — the serrations create new impressions in the mating surface. Reinstalling in the same position has reduced locking effect. Replace serrated flange bolts on critical joint re-assembly.
- Flange Clearance: The flange OD is larger than the bolt hex across-flats — ensure sufficient clearance for the flange at the joint before specifying flange bolts. In tight bolt patterns, the flange may foul adjacent flanges or surfaces.
Australian Business, Local Supply: As a proudly Australian business since 1988, we stock locally and work with trusted local Australian manufacturers and distributors to ensure fast, reliable supply.
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See our full fasteners range including hex bolts and nuts, flanged nuts, and lock washers.