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Flat Round Washers DIN125

Flat Round Washers DIN125
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. The most popular stainless grade.

A4-70 G316 Marine Grade Stainless — Within 300 metres of the coast, food and chemical processing. Largely non-magnetic — A small degree of magnetism is normal.

SIZE RANGE

M1.6 through M30 in both grades. Each size lists the actual ID, OD and thickness in the product table — the size reference is the bolt diameter the washer fits, not the OD.

WHEN TO USE DIN 125 vs OTHER FLAT WASHERS

Use DIN 125 when you want a compact, standard-OD washer for general assembly. If you need a larger bearing surface (thin sheet, mudguards, soft timber) step up to a mudguard or HEC standard washer. If you need a smaller OD for tight clearances, look at DIN 433 small OD.

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 125 washer.

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22 Items found

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DIN 125 is the standard German specification for the most common flat washer dimensions. The outside diameter is usually a little more than twice the inside diameter — making this a compact washer suited to general assembly work where a full-size mudguard washer would be overkill.

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 125A Flat Round Washers Metric Stainless G304 · Specs - DIN 125A 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 22 items
Size
  1. M5 (5mm) 2 items
  2. M6 (6mm) 2 items
  3. M8 (8mm) 2 items
  4. M10 (10mm) 2 items
  5. M12 (12mm) 2 items
  6. M14 (14mm) 2 items
  7. M16 (16mm) 2 items
  8. M18 (18mm) 2 items
  9. M20 (20mm) 2 items
  10. M24 (24mm) 2 items
  11. M36 (36mm) 2 items
To Suit Fastener Size
  1. M5 | 3/16" | 10g | #10 | 2BA 2 items
  2. M6 | 1/4" | 12g | 14g | #12 2 items
  3. M8 | 5/16" 2 items
  4. M10 2 items
  5. M12 | 1/2" 2 items
  6. M14 | 9/16" 2 items
  7. M16 | 5/8" 2 items
  8. M18 2 items
  9. M20 | 3/4" 2 items
  10. M24 2 items
  11. M36 | 1-1/2" 2 items
Material / Finish
  1. Stainless Steel 22 items
Class / Grade
  1. A2-70 G304 11 items
  2. A4-70 G316 11 items
Corrosion Protection Level
  1. Ultimate 11 items
  2. Excellent 11 items
Inside Measurement Range Guide
  1. 5.00 - 5.75mm 2 items
  2. 6.10 - 7.10mm 2 items
  3. 8.20 - 9.30mm 2 items
  4. 10.20 - 11.70mm 2 items
  5. 12.20 - 14.00mm 2 items
  6. 14.20 - 15.60mm 2 items
  7. 16.80 - 18.60mm 2 items
  8. 18.20 - 19.60mm 2 items
  9. 20.10 - 22.50mm 2 items
  10. 24.50 - 27.50mm 2 items
  11. 36.50 - 39.00mm 2 items
Outside Dia. Range Guide
  1. 3.00 - 9.99mm 2 items
  2. 10.00 - 14.99mm 2 items
  3. 15.00 - 19.99mm 4 items
  4. 25.00 - 29.99mm 6 items
  5. 30.00 - 34.99mm 2 items
  6. 35.00 - 39.99mm 2 items
  7. 40.00 - 49.99mm 2 items
  8. 60.00 - 69.99mm 2 items
Thickness Range Guide
  1. 0.50 - 0.99mm 2 items
  2. 1.50 - 1.99mm 6 items
  3. 2.00 - 2.49mm 3 items
  4. 2.50 - 2.99mm 7 items
  5. 3.50 - 3.99mm 2 items
  6. 4.50 - 4.99mm 2 items
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