DIN125 Flat Washer - Boltead Bolts & Nuts

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DIN125 Flat Washer

MOQ: 1000kg

Flat washers can generally be divided into flat washers and round flat washers according to appearance. Flat washers also known as plain washer. Flat washers are Boltead’s main products, we manufacture and supply Flat washers. The following is the basic information of our Flat washers products.

Name	Flat Washers	Materials	Carbon Steel/Stainless Steel
Standards	DIN ISO ANC BSW JIS etc.	Strength level	4.8 8.8 10.9 etc.
Size	M1.6-M160	Surface finish	ZP\BLACK\HDG etc.
Length	0.3-20	Samples	Available

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Flat Washers Product Photos

Flat washers are Boltead’s products with relatively high production and supply. The following are photos of flat washers using some of the more common surface treatments：

Flat Washers Product Describsion

Flat washers are Boltead’s main product. We are a manufacturer of flat washers and also a supplier of flat washers. While producing and supplying lat washers, we also produce bolts, nuts and other fastener products used in conjunction with them.

The flat washers we produce are generally classified according to whether the material is carbon steel or stainless steel. More specific classifications are as follows:

There are three common classification methods for washer grades.
Washers can generally be classified according to material, such as carbon steel washers and stainless steel washers.
There are also classifications based on use, shape and size, such as Class A, Class C, etc.
In addition, some washers have strength levels, such as spring washers, which are divided into levels 4.8, 8.8, etc.

In addition to different materials and strengths, the biggest impact on flat washers is surface treatment. The following are the more common surface treatments for flat washers: black oxide, black zinc, zinc plated (ZP), color zinc plating (CZP /YZP), hot dip galvanized (HDG), dacromet coating, etc.

Flat Washers Production Process

Flat washers are sent from the raw material line to the final product. They generally go through the following process:
Annealing of raw materials – pickling – drawing – forming – grinding – heat treatment – surface treatment – classification – packaging – shipping

The rough schematic diagram is as follows:

Hex bolt production process — Flat washers production process

Flat Washers Application fields

Flat washers have a wide range of applications in various industries and settings. Some common applications include:

Flat washers are commonly used in construction and structural engineering for distributing the load of a threaded fastener, such as a bolt or nut, over a wider area, providing stability and reinforcement in various building and infrastructure projects.
These washers find extensive use in machinery and equipment assembly to prevent damage to surfaces, reduce friction, and distribute the load of fasteners, ensuring secure and reliable connections in industrial settings.
Flat washers are employed in automotive manufacturing and repair for use in engine components, chassis assemblies, and suspension systems, providing support and load distribution in critical automotive applications.
They are utilized in plumbing and pipe fittings to provide a seal and evenly distribute pressure in water, gas, and hydraulic systems, preventing leaks and ensuring proper sealing and fastening.
In electrical and electronic equipment assembly, flat washers are used for insulation, spacing, and load distribution in circuit boards, enclosures, and mounting applications, ensuring secure and stable installations.
Flat washers find application in woodworking, carpentry, and furniture assembly for reinforcing joints, reducing friction, and protecting surfaces from damage during fastening and assembly processes.
They are also employed in metal fabrication, custom manufacturing, and DIY projects for a wide range of applications where load distribution, surface protection, and reinforcement are essential for secure and reliable fastening.

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For more information and knowledge about Flat Washers, please check our blog

Flat Washers DIN 125

Specification		Φ1.7	Φ1.8	Φ2.2	Φ2.5	Φ2.7	Φ2.8	Φ3.2	Φ3.7	Φ4.3	Φ5.3	Φ6.4	Φ7.4	Φ8.4	Φ10.5	F13	F15
M	Corresponding bolt specifications	M1.6	M1.7	M2	M2.3	M2.5	M2.6	M3	M3.5	M4	M5	M6	M7	M8	M10	M12	M14
d	min=nominal	1.7	1.8	2.2	2.5	2.7	2.8	3.2	3.7	4.3	5.3	6.4	7.4	8.4	10.5	13	15
d	maximum value	1.84	1.94	2.34	2.64	2.84	2.94	3.38	3.88	4.48	5.48	6.62	7.62	8.62	10.77	13.27	15.27
dc	max = nominal	4	4.5	5	6	6	7	7	8	9	10	12	14	16	20	twenty four	28
dc	minimum	3.7	4.2	4.7	5.7	5.7	6.64	6.64	7.64	8.64	9.64	11.57	13.57	15.57	19.48	23.48	27.48
h	Nominal	0.3	0.3	0.3	0.5	0.5	0.5	0.5	0.5	0.8	1	1.6	1.6	1.6	2	2.5	2.5
	maximum value	0.35	0.35	0.35	0.55	0.55	0.55	0.55	0.55	0.9	1.1	1.8	1.8	1.8	2.2	2.7	2.7
	minimum	0.25	0.25	0.25	0.45	0.45	0.45	0.45	0.45	0.7	0.9	1.4	1.4	1.4	1.8	2.3	2.3
Thousand pieces (steel)≈kg		0.024	0.031	0.037	0.092	0.088	0.127	0.119	0.155	0.308	0.443	1.02	1.39	1.83	3.57	6.27	8.62
Specification		F17	F19	F21	F23	Φ25	F27	F28	F29	F31	F33	F34	F36	F37	F39	Φ40	F41
M	Corresponding bolt specifications	M16	M18	M20	M22	M24	M26	M27	M28	M30	M32	M33	M35	M36	M38	M39	M40
d	min=nominal	17	19	twenty one	twenty three	25	27	28	29	31	33	34	36	37	39	40	41
d	maximum value	17.27	19.33	21.33	23.33	25.33	27.33	28.33	29.33	31.39	33.62	34.62	36.62	37.62	39.62	40.62	41.62
dc	max = nominal	30	34	37	39	44	50	50	50	56	60	60	66	66	72	72	72
dc	minimum	29.48	33.38	36.38	38.38	43.38	49.38	49.38	49.38	55.26	58.8	58.8	64.8	64.8	70.8	70.8	70.8
h	Nominal	3	3	3	3	4	4	4	4	4	5	5	5	5	6	6	6
	maximum value	3.3	3.3	3.3	3.3	4.3	4.3	4.3	4.3	4.3	5.6	5.6	5.6	5.6	6.6	6.6	6.6
	minimum	2.7	2.7	2.7	2.7	3.7	3.7	3.7	3.7	3.7	4.4	4.4	4.4	4.4	5.4	5.4	5.4
Thousand pieces (steel)≈kg		11.3	14.7	17.2	18.3	32.3	43.7	42.3	40.9	53.6	77.4	75.3	94.3	92.1	136	133	130
Specification		F43	F46	Φ50	F52	F54	F57	F58	Φ60	F62	F66	Φ70	F74	F78	F82	F87	F93
M	Corresponding bolt specifications	M42	M45	M48	M50	M52	M55	M56	M58	M60	M64	M68	M72	M76	M80	M85	M90
d	min=nominal	43	46	50	52	54	57	58	60	62	66	70	74	78	82	87	93
d	maximum value	43.62	46.62	50.62	52.74	54.74	57.74	58.74	60.74	62.74	66.74	70.74	74.74	78.74	82.87	87.87	93.87
dc	max = nominal	78	85	92	92	98	105	105	110	110	115	120	125	135	140	145	160
dc	minimum	76.8	83.6	90.6	90.6	96.6	103.6	103.6	108.6	108.6	113.6	118.6	123.4	133.4	138.4	143.4	158.4
h	Nominal	7	7	8	8	8	9	9	9	9	9	10	10	10	12	12	12
	maximum value	8	8	9	9	9	10	10	10	10	10	11	11	11	13.2	13.2	13.2
	minimum	6	6	7	7	7	8	8	8	8	8	9	9	9	10.8	10.8	10.8
Thousand pieces (steel)≈kg		183	220	294	284	330	431	425	472	458	492	586	626	749	953	996	1250

Specification		F98	F104	F109	F114	F119	F124	F129	F134	F139	F144	F149	Φ155	Φ165
M	Corresponding bolt specifications	M95	M100	M105	M110	M115	M120	M125	M130	M135	M140	M145	M150	M160
d	min=nominal	98	104	109	114	119	124	129	134	139	144	149	155	165
d	maximum value	98.87	104.87	109.87	114.87	119.87	125	130	135	140	145	150	156	166
dc	max = nominal	165	175	180	185	200	210	220	220	230	240	250	250	250
dc	minimum	163.4	173.4	178.4	183.15	198.15*	208.15	218.15	218.15	228.15	238.15	248.15	248.15	248.15
h	Nominal	12	14	14	14	14	16	16	16	16	18	18	18	18
	maximum value	13.2	15.2	15.2	15.2	15.2	17.2	17.2	17.2	17.2	19.2	19.2	19.2	19.2
	minimum	10.8	12.8	12.8	12.8	12.8	14.8	14.8	14.8	14.8	16.8	16.8	16.8	16.8
Thousand pieces (steel)≈kg		1300	1710	1770	1830	2230	2830	3130	3000	3310	4090	4470	4270	3910

FAQ

Boltead’s delivery cycle is generally 7 to 15 days. If you need more product types and models, or need to customize, the delivery cycle will be longer. In this case, please confirm with our sales professional.

Boltead is a fastener manufacturer and supplier. We are the source factory. The introduction of Boltead can be found here!

Boltead can provide samples for your measurement and testing. The samples are free, and you only need to pay the shipping cost.

Of course. Boltead welcomes OEM/ODM orders. We can not only customize products for you, but also customize your product and its packaging.

For payment amounts <= $1000, 100% prepayment is required. For payment amounts >$1000, 30% prepayment is required, with the balance due before shipment.

Yes, we can provide most documents, such as material certificates, product testing certificates, certificates of origin, and insurance certificates.

Yes, Boltead can ensure the safe and reliable delivery of products to you. Our product packaging will be reinforced beyond the packaging you choose.

The shipping cost depends on the delivery method you choose. Express delivery is typically the fastest but also the most expensive option. Sea freight is the best solution for large quantities of goods. We can provide an accurate shipping cost only when we have detailed information about the quantity, weight, and method. Please contact us for more information.

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We manufacture and supply fasteners, striving for excellence in every aspect.

Boltead producing fasteners since 2001.All the fasteners we produce have been supplied for export since 2018.

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