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DIN125 Flat Washer

DIN 125 is the standard for plain flat washers, widely matched with hex bolts, nuts and screws for mechanical and construction fastening. It is a basic auxiliary fastener used to increase bearing area, distribute pressure, prevent loosening and protect surface from damage during installation.

Standard Dimensions

Inner diameter (ID): Match metric bolt sizes from M3 to M48

Outer diameter (OD), thickness strictly comply with DIN 125 standard

Smooth flat surface, uniform thickness, no burrs

Custom sizes and thickness available on request

Key Features

Increase contact area, reduce pressure on workpiece surface

Prevent bolt/nut from sinking into soft materials

Protect painted, plated or fragile surfaces from scratch and damage

Improve fastening stability, assist anti‑loosening effect

Perfectly matched with DIN 933 bolts and DIN 934 nuts

Application Scenarios

Widely used in machinery manufacturing, steel structure, construction engineering, electrical equipment, furniture hardware, automotive parts, pipeline fixing and general industrial assembly.

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Description

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Product Name	Flat Washer
Material	Carbon steel, Stainless steel
Surface Finish	Yellow zinc, Blackened, Blue and white zinc, Bleached
Colour	Yellow, Black, Blue White, White
Standard Number	DIN,ASME,ASNI,ISO
Grade	4.8 5.8 8.8 10.9 A2-70
Diameter	M1.6 M2 M4 M5 M6 M7 M8 M10 M12 M14 M16 M18 M20 M45 M48 M52 M56 M60 M64
Thread form	Coarse thread, Fine thread
Place of origin	Hebei, China
Brand	Muyi
Pack	Box+cardboard carton+pallet
The product can be customized
1.A washer is a seal that fills the gap between two mating surfaces, allowing the two workpieces to be connected together without leakage even when compressed. 2.A washer can fill some irregularities on the surface, allowing for some imperfections in the mating surfaces of the workpieces. washer are generally made by cutting and splitting thin sheets. 3.Generally speaking, the ideal washer material is one that allows a certain degree of deformation so that it can deform and fill the corresponding space (including some slight irregularities) during assembly. Some washer require the addition of sealants directly to the surface in order for the gasket to work properly.

Thread Spec d		M1.6	M2	M2.5	M3	M4	M5	M6	M8	M10	M12	M14	M16	M18	M20
d	max	1.84	2.34	2.84	3. 38	4.48	5.48	6.62	8.62	10.77	13.27	15. 27	17.27	19.38	21.33
d	min	1.7	2.2	2.7	3.2	4.3	5.3	6.4	8.4	10.5	13	15	17	19	21
dc	max	4	5	6	7	9	10	12	16	20	24	28	30	34	37
dc	min	3.7	4.7	5.7	6.64	8.64	9.64	11.57	15.57	19.48	23.48	27.48	29.48	33.38	36.38
h	Nominal	0.3	0.3	0.5	0.5	0.8	1	1.6	1.6	2	2.5	2.5	3	3	3
	max	0.35	0.35	0.55	0.55	0.9	1.1	1.8	1.8	2.2	2.7	2.7	3.3	3.3	3.3
	min	0.25	0.25	0.45	0.45	0.7	0.9	1.4	1.4	1.8	2.3	2.3	2.7	2.7	2.7

Thread Spec d		M22	M24	M27	M30	M33	M36	M39	M42	M45	M48	M52	M56	M60	M64
d	max	23.33	25.33	28.33	31.39	34.62	37.62	42.62	45.62	48.62	52.74	56.74	62.74	66.74	70.74
d	min	23	25	28	31	34	37	42	45	48	52	56	62	66	70
dc	max	39	44	50	56	60	66	72	78	85	92	98	105	110	115
dc	min	38.38	43.38	49.38	55.26	58.8	64.8	70.8	76.8	83.6	90.6	96.6	103.6	108.6	113.6
h	Nominal	3	4	4	4	5	5	6	8	8	8	8	10	10	10
	max	3.3	4.3	4.3	4.3	5.6	5.6	6.6	9	9	9	9	11	11	11
	min	2.7	3.7	3.7	3.7	4.4	4.4	5.4	7	7	7	7	9	9	9

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Product

New self-tapping hook series is now available

Join Us at Fastener Expo Shanghai 2026 – Large Premium Booth

Shipping records

Spring Festival Holiday Notice

In the new year of 2026, our factory and office teams look forward to cooperating with you all.

We’ve grown together year after year.

DIN125 Flat Washer

Standard Dimensions

Key Features

Application Scenarios

Description

sign

Packing and delivery

contact us

Related popular products

DIN934 Hex Nut

DIN985 Hex Lock Nut with blue

Sleeve anchor with hex nut

SS TAM Anchor

GB37 T-head bolt Full thread

DIN 6923 Flange nuts

Hexagon Head Wood Screws

Drop in anchor

Zinc Alloy Drive Anchor

Drop in anchor

DIN982 Hex Lock Nut with blue

DIN985 Hex Lock Nut with blue

Sleeve anchor with hook

Sleeve anchor with hex bolt

Elevator expansion Anchor

Plastic Rubber Plug Nylon Expansion Anchor

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