Engineering Data 2.2 / System C

DIN 125 A PLAIN WASHER — DIMENSIONS, WEIGHTS & ISO 7089 EQUIVALENCE

DIN 125 A is the legacy German designation for the plain washer, normal series, product grade A. The current international standard is ISO 7089:2000, and the two call out the same dimensions — all 29 sizes in our compiled table match. This page gives the complete size table with tolerances and theoretical weight per 1,000 pieces.

1. Standard Identity

Legacy designation

DIN 125 A

Current standard

ISO 7089:2000

Series

Normal series

Product grade

Size range

1.7 mm – 37 mm (for threads M1.6 – M36)

Type

Plain washer, unchamfered (DIN 125 B is the chamfered version)

2. Dimensions — normal series, M1.6 to M36

Size	For thread	d1 min.	d1 max.	d2 min.	d2 max.	h min.	h max.	Weight kg / 1,000 pcs
1,7	M1,6	1,7	1,84	3,7	4	0,25	0,35	0,024
1,8	M1,7	1,8	1,94	4,2	4,5	0,25	0,35	0,031
2,2	M2	2,2	2,34	4,7	5	0,25	0,35	0,037
2,5	M2,3	2,5	2,64	5,7	6	0,45	0,55	0,092
2,7	M2,5	2,7	2,84	5,7	6	0,45	0,55	0,088
2,8	M2,6	2,8	2,94	6,64	7	0,45	0,55	0,127
3,2	M3	3,2	3,38	6,64	7	0,45	0,55	0,119
3,7	M3,5	3,7	3,88	7,64	8	0,45	0,55	0,155
4,3	M4	4,3	4,48	8,64	9	0,7	0,9	0,308
5,3	M5	5,3	5,48	9,64	10	0,9	1,1	0,443
6,4	M6	6,4	6,62	11,57	12	1,4	1,8	1,02
7,4	M7	7,4	7,62	13,57	14	1,4	1,8	1,39
8,4	M8	8,4	8,62	15,57	16	1,4	1,8	1,83
10,5	M10	10,5	10,77	19,48	20	1,8	2,2	3,57
13	M12	13	13,27	23,48	24	2,3	2,7	6,27
15	M14	15	15,27	27,48	28	2,3	2,7	8,62
17	M16	17	17,27	29,48	30	2,7	3,3	11,3
19	M18	19	19,33	33,38	34	2,7	3,3	14,7
21	M20	21	21,33	36,38	37	2,7	3,3	17,2
23	M22	23	23,33	38,38	39	2,7	3,3	18,3
25	M24	25	25,33	43,38	44	3,7	4,3	32,3
27	M26	27	27,33	49,38	50	3,7	4,3	43,7
28	M27	28	28,33	49,38	50	3,7	4,3	42,3
29	M28	29	29,33	49,38	50	3,7	4,3	40,9
31	M30	31	31,39	55,26	56	3,7	4,3	53,6
33	M32	33	33,62	58,8	60	4,4	5,6	77,4
34	M33	34	34,62	58,8	60	4,4	5,6	75,3
36	M35	36	36,62	64,8	66	4,4	5,6	94,3
37	M36	37	37,62	64,8	66	4,4	5,6	92,1

Dimensions in millimetres. Source: DIN 125 A normal series — verified identical to ISO 7089:2000 (29/29 sizes). Weight is a theoretical estimate per 1,000 pieces.

3. How to read the table

d1 is the inner diameter, d2 the outer diameter and h the thickness; the table gives the minimum and maximum of each. The washer size is not the same number as the thread size — an M10 bolt uses the 10.5 washer. The last column is the theoretical weight per 1,000 pieces. Per-size pages: DIN 125 A size chart. For any other size use the weight calculator.

4. Materials and finishes

Washers are quoted in carbon steel and stainless steel (A2 / A4). Standard finishes are zinc plating, hot-dip galvanizing, zinc-nickel and dacromet. See mechanical properties and surface treatment.

5. Equivalent standards

Standard	Relationship	Note
ISO 7089:2000	Current standard; dimensionally identical	29/29 sizes match in our data
DIN 125 B	Chamfered version of the same series	Use only when a chamfer is specified
ISO 7090	Chamfered version (ISO)	Not interchangeable where the chamfer matters
ASME B18.22.1	Inch series — not interchangeable	Different diameters and thicknesses

6. How to order

State the size (washer size or the thread it fits), material and grade, finish and quantity. If the drawing calls DIN 125 A, say so — the dimensions are the same as ISO 7089 and we quote either designation.

DIN 125 A plain washer — product page Request a quotation

7. FAQ

Is DIN 125 A the same as ISO 7089?

Dimensionally yes. In our compiled data all 29 sizes match ISO 7089:2000 (d1, d2, h and weight). DIN 125 A is the legacy German designation; ISO 7089:2000 is the current international standard.

What is the difference between DIN 125 A and DIN 125 B?

DIN 125 A is the plain (unchamfered) washer; DIN 125 B is the chamfered version. Use B only where the drawing calls for a chamfer.

What sizes does DIN 125 A cover?

Washer sizes from 1.7 mm (for M1.6 thread) up to 37 mm (for M36 thread). The table lists every size with tolerances.

Which washer fits an M10 bolt?

Size 10.5: inner diameter 10.5–10.77 mm, outer diameter 19.48–20 mm, thickness 1.8–2.2 mm, about 3.57 kg per 1,000 pieces.

What do d1, d2 and h mean?

d1 is the inner diameter, d2 the outer diameter and h the thickness. The table gives minimum and maximum of each.

What material and finish are available?

Carbon steel and stainless steel (A2 / A4). Standard finishes: zinc plating, hot-dip galvanizing, zinc-nickel and dacromet; hardness and coating class are confirmed on the drawing or order.

How much does one DIN 125 A washer weigh?

The last column gives the theoretical weight per 1,000 pieces — for example a size 10.5 washer is about 3.57 kg per 1,000 pcs.

Is DIN 125 A still valid?

DIN 125 A is a legacy designation still widely used on drawings; the current international standard is ISO 7089:2000, and both call out the same washer dimensions.

8. Sources and version

Dimensions and weights: DIN 125 A normal series table, verified identical to ISO 7089:2000 — 29 of 29 sizes (compiled in our data set; source: fasteners.eu, retrieved 2026-10-28). Weight values are theoretical per 1,000 pieces. Page last reviewed: 2026-10-29.