Description
Premium 316 Stainless Steel A4-70 Hex Bolts – available in sizes M6 to M27 and lengths up to 800mm. Manufactured to DIN931 standards, these marine-grade bolts offer exceptional corrosion resistance and strength for structural, marine, and outdoor use. Ideal for construction, heavy industry, and boat building.
Description
A4-50 HEX BOLT DIN931
Finish
316 STAINLESS
When you need a bolt that delivers maximum strength, durability, and resistance to harsh environments, our 316 Stainless Steel A4-70 Hex Bolts are the ultimate choice. Manufactured to DIN931 standards, these premium fasteners are trusted by builders, marine engineers, and industry professionals across Australia for projects that demand long-lasting performance.
Built for Harsh Conditions
Crafted from 316 marine-grade stainless steel, our A4-70 hex bolts provide exceptional corrosion resistance, even in coastal, chemical, and high-moisture environments. The addition of molybdenum in the 316 alloy ensures superior resistance to pitting and rust compared to standard 304 stainless steel, making them ideal for marine, outdoor, and industrial applications.
Available in All Sizes & Lengths
We stock an extensive range of metric sizes from M6 to M27 and lengths from 30mm to 800mm, ensuring you’ll find the exact bolt for your project. Whether you need a short bolt for machinery assembly or an extra-long fastener for structural construction, we have it ready for immediate dispatch.
Precision-Engineered to DIN931
Our 316 stainless steel hex bolts are precision-manufactured to DIN931 specifications, guaranteeing consistent quality, dimensional accuracy, and reliable tensile strength. The part-threaded shank design provides optimal clamping force and prevents over-tightening, making them suitable for high-load applications.
Applications
Marine & Boating – Perfect for decks, hull fittings, masts, and engine mounts.
Construction – Structural steel connections, timber framing, and architectural projects.
Industrial & Manufacturing – Machinery, conveyor systems, and equipment assembly.
Outdoor Installations – Pergolas, fencing, signage, and infrastructure exposed to weather.
Why Choose Our 316 Stainless Hex Bolts?
Marine Grade – Designed to withstand saltwater exposure and extreme weather.
Corrosion Resistant – Ideal for coastal, chemical, and wet environments.
High Strength – A4-70 tensile rating for heavy-duty performance.
Full Range in Stock – From small M6 bolts to large M27 heavy-duty sizes.
Fast Nationwide Shipping – We dispatch orders quickly from our Australian warehouses.
Matching Nuts & Washers Available
For a complete fastening solution, pair your bolts with our 316 stainless steel nuts and 316 stainless washers. Using matching grade hardware ensures maximum corrosion resistance and performance.
| Diameter | Available Lengths (mm) |
|---|---|
| M6 | 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, 100, 110, 130, 140, 150 |
| M8 | 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, 100, 110, 120, 130, 140, 150 |
| M10 | 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 200, 220, 240, 250, 260, 280, 300 |
| M12 | 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 240, 250, 260, 280, 300, 350 |
| M14 | 50, 60, 70, 75, 80, 90, 100, 120, 140, 150 |
| M16 | 50, 55, 60, 65, 70, 75, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 200, 220, 240, 250, 260, 270, 280, 300, 325, 350, 400, 450, 500, 550 |
| M18 | 80, 100, 120, 150 |
| M20 | 60, 65, 70, 75, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 220, 240, 250, 260, 280, 300, 350, 375, 400, 425, 450, 500, 600, 700, 800 |
| M22 | 90, 100, 120, 150 |
| M24 | 70, 75, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 240, 250, 260, 280, 300, 350, 400, 500 |
| M27 | 90, 100, 110, 120, 130 |
