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High Tensile Round Washers

High Tensile Round Washers
How to measure washers
Two ways to confirm before you order - whichever you already know.
1If you know your bolt size

Washers are named by the bolt they fit: an M10 washer suits an M10 bolt. The inside diameter is slightly larger than the bolt so it slides on. Our guide covers every size and washer type we stock.

Open the washer measuring guide ›

Open the washer gauge sizing chart ›

2If you have a washer in hand

Measure the inside diameter (ID), outside diameter (OD) and thickness, as shown in the drawing.

Washer measurement diagram - inside diameter, outside diameter and thickness

MATERIALS AND FINISHES

High Tensile Class 8 / 8.8 Steel — Zinc Plated — Bright silver zinc, for general industrial use.

High Tensile Class 8.8 Galvanised — Hot-dip galvanised, outdoor and structural applications.

PAIRING WITH BOLTS

Match the washer grade to the bolt grade. A Class 8.8 bolt deserves at minimum a Class 8 washer; pairing with a low-tensile (Class 4.6) washer will likely cause washer deformation under full preload. For Class 10.9 and 12.9 applications, see our structural K0 washers.

WHY AUSTRALIA TRUSTS BOLT & NUT

With 15+ years selling fasteners online from Brisbane, we hold over 25,000 stock lines and 200 million pieces — 98.75% of online orders placed before 1pm leave same day. Save more as you buy more — we offer up to 13 price breaks plus 3 spend-tier discounts. Read our customer reviews or get in touch if you need help picking the right high tensile washer.

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31 Items found

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High tensile flat round washers are made from harder material than standard washers — typically Class 8 or 8.8 — to withstand the clamping loads generated by high tensile bolts. Using a low tensile washer with a high tensile bolt can result in washer deformation, reduced preload, and joint failure over time.

TECHNICAL RESOURCES

Need help identifying your washer? See our washer measuring guide, or check the washer gauge sizing chart.

For full sizing data and standards, see our Technical PDFs library.

Filter by :
Filter By
Category
System of Measurement
  1. Metric 12 items
  2. Imperial 19 items
Size
  1. M5 (5mm) 1 item
  2. M6 (6mm) 1 item
  3. M8 (8mm) 1 item
  4. M10 (10mm) 1 item
  5. M12 (12mm) 1 item
  6. M14 (14mm) 1 item
  7. M16 (16mm) 1 item
  8. M18 (18mm) 1 item
  9. M20 (20mm) 1 item
  10. M24 (24mm) 1 item
  11. M30 (30mm) 1 item
  12. M36 (36mm) 1 item
  13. 1/4" 1 item
  14. 5/16" 1 item
  15. 3/8" 1 item
  16. 7/16" 1 item
  17. 1/2" 1 item
  18. 9/16" 1 item
  19. 5/8" 1 item
  20. 3/4" 1 item
  21. 7/8" 1 item
  22. 1" 1 item
  23. 1-1/8" 1 item
  24. 1-1/4" 1 item
  25. 1-3/8" 1 item
  26. 1-1/2" 1 item
  27. 1-3/4" 1 item
  28. 2" 1 item
  29. 2-1/4" 1 item
  30. 2-1/2" 1 item
  31. 3" 1 item
To Suit Fastener Size
  1. M5 | 3/16" | 10g | #10 | 2BA 1 item
  2. M6 | 1/4" | 12g | 14g | #12 2 items
  3. M8 | 5/16" 2 items
  4. M10 1 item
  5. M10 | 3/8" 1 item
  6. 7/16" 1 item
  7. M12 | 1/2" 1 item
  8. 1/2" | 2BA 1 item
  9. M14 | 9/16" 2 items
  10. M16 | 5/8" 2 items
  11. M18 1 item
  12. M20 | 3/4" 2 items
  13. M22 | 7/8" 1 item
  14. M24 2 items
  15. M27 | 1-1/8" 1 item
  16. M30 1 item
  17. M33 | 1-1/4" 1 item
  18. M36 | 1-1/2" 3 items
  19. M45 | 1-3/4" 1 item
  20. M52 | 2" 1 item
  21. M56 | 2-1/4" 1 item
  22. M64 | 2-1/2" 1 item
  23. 3" 1 item
Material / Finish
  1. Zinc Silver Plated 12 items
  2. Zinc Yellow Plated 19 items
Class / Grade
  1. High Tensile Grade 8 19 items
  2. High Tensile Class 8.8 12 items
Corrosion Protection Level
  1. Moderate 31 items
Inside Measurement Range Guide
  1. 5.00 - 5.75mm 1 item
  2. 6.10 - 7.10mm 1 item
  3. 6.50 - 7.50mm 1 item
  4. 8.20 - 9.30mm 2 items
  5. 10.20 - 11.70mm 2 items
  6. 11.30 - 12.60mm 1 item
  7. 12.20 - 14.00mm 2 items
  8. 15.60 - 16.60mm 2 items
  9. 16.80 - 18.60mm 2 items
  10. 19.20 - 21.10mm 1 item
  11. 20.10 - 22.50mm 2 items
  12. 22.30 - 24.50mm 1 item
  13. 24.50 - 27.50mm 1 item
  14. 27.50 - 29.50mm 1 item
  15. 31.00 - 33.00mm 2 items
  16. 33.00 - 36.00mm 1 item
  17. 36.50 - 39.00mm 1 item
  18. 39.00 - 43.00mm 2 items
  19. 47.00 - 50.00mm 1 item
  20. 53.70 - 56.00mm 1 item
  21. 61.00 - 63.00mm 1 item
  22. 67.00 - 69.50mm 1 item
  23. 79.00 - 81.00mm 1 item
Outside Dia. Range Guide
  1. 10.00 - 14.99mm 2 items
  2. 15.00 - 19.99mm 4 items
  3. 25.00 - 29.99mm 6 items
  4. 30.00 - 34.99mm 2 items
  5. 35.00 - 39.99mm 2 items
  6. 40.00 - 49.99mm 2 items
  7. 50.00 - 59.99mm 3 items
  8. 60.00 - 69.99mm 3 items
  9. 70.00 - 79.99mm 2 items
  10. 80.00 - 89.99mm 1 item
  11. 90.00 - 99.99mm 1 item
  12. 100.00 - 140.00mm 3 items
Thickness Range Guide
  1. 1.00 - 1.49mm 6 items
  2. 1.50 - 1.99mm 2 items
  3. 2.00 - 2.49mm 1 item
  4. 3.00 - 3.49mm 10 items
  5. 3.50 - 3.99mm 7 items
  6. 4.50 - 4.99mm 1 item
  7. 5.00 - 5.99mm 2 items
  8. 6.00 - 6.99mm 2 items
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