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Flat Round Washers DIN433 Small OD

Flat Round Washers DIN433 Small OD
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

A2-70 G304 Stainless Steel — General outdoor and indoor use, food contact, most chemical environments.

A4-70 G316 Marine Grade Stainless — Within 300 metres of the coast and in food/chemical environments. Largely non-magnetic — A small amount of magnetism is normal.

WHEN TO CHOOSE DIN 433

Pick DIN 433 when clearance around the bolt head is tight, when assembling into a counterbored hole, or when the load is light enough that the smaller bearing surface is sufficient. For higher-load or softer-material applications, use a standard DIN 125 or a mudguard washer.

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 DIN 433 washer.

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30 Items found

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DIN 433 is the small outside diameter version of the standard flat washer — useful when you need a washer for load spreading but the surrounding clearance won't accept a full-size DIN 125 or mudguard washer. The OD is just a little more than twice the ID, making it the most compact flat washer in our range.

TECHNICAL RESOURCES

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

Key charts and specification sheets: Metric to Imperial Chart · Specs - DIN 433 Flat Round Washers Metric Stainless G304 · Specs - DIN 433 Flat Round Washers Metric Stainless G316

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

Filter by :
Filter By
Category
System of Measurement
  1. Metric 30 items
Size
  1. M1.6 (1.6mm) 2 items
  2. M2 (2mm) 2 items
  3. M2.5 (2.5mm) 2 items
  4. M3 (3mm) 2 items
  5. M3.5 (3.5mm) 2 items
  6. M4 (4mm) 2 items
  7. M5 (5mm) 2 items
  8. M6 (6mm) 2 items
  9. M8 (8mm) 2 items
  10. M10 (10mm) 2 items
  11. M12 (12mm) 2 items
  12. M14 (14mm) 2 items
  13. M16 (16mm) 2 items
  14. M18 (18mm) 2 items
  15. M20 (20mm) 2 items
To Suit Fastener Size
  1. M1.6 | 1-72 2 items
  2. M2 | #2 | 9BA 2 items
  3. M2.5 | #3 | 7BA 2 items
  4. M3 | 1/8" | #5 | 6BA 2 items
  5. M3.5 | #6 2 items
  6. M4 | 5/32" | 6g | 7g | 8g | #8 | 4BA 2 items
  7. M5 | 3/16" | 10g | #10 | 2BA 2 items
  8. M6 | 1/4" | 12g | 14g | #12 2 items
  9. M8 | 5/16" 2 items
  10. M10 2 items
  11. M12 | 1/2" 2 items
  12. M14 | 9/16" 2 items
  13. M16 | 5/8" 2 items
  14. M18 2 items
  15. M20 | 3/4" 2 items
Material / Finish
  1. Stainless Steel 30 items
Class / Grade
  1. A2-70 G304 15 items
  2. A4-70 G316 15 items
Corrosion Protection Level
  1. Ultimate 15 items
  2. Excellent 15 items
Inside Measurement Range Guide
  1. 1.65 - 1.90mm 2 items
  2. 2.10 - 2.40mm 2 items
  3. 2.60 - 2.90mm 2 items
  4. 3.10 - 3.60mm 2 items
  5. 3.60 - 4.00mm 2 items
  6. 4.10 - 4.70mm 2 items
  7. 5.00 - 5.75mm 2 items
  8. 6.10 - 7.10mm 2 items
  9. 8.20 - 9.30mm 2 items
  10. 10.20 - 11.70mm 2 items
  11. 12.20 - 14.00mm 2 items
  12. 14.20 - 15.60mm 2 items
  13. 16.80 - 18.60mm 2 items
  14. 18.20 - 19.60mm 2 items
  15. 20.10 - 22.50mm 2 items
Outside Dia. Range Guide
  1. 3.00 - 9.99mm 14 items
  2. 10.00 - 14.99mm 4 items
  3. 15.00 - 19.99mm 4 items
  4. 25.00 - 29.99mm 6 items
  5. 30.00 - 34.99mm 2 items
Thickness Range Guide
  1. 0.30 - 0.49mm 4 items
  2. 0.50 - 0.99mm 8 items
  3. 1.00 - 1.49mm 2 items
  4. 1.50 - 1.99mm 10 items
  5. 2.00 - 2.49mm 4 items
  6. 2.50 - 2.99mm 2 items
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