DIN 137A M10 Specifications Curved Spring Washers

The DIN 137A M10 Specifications Curved Spring Washers from fastener supplier Xiaoguo® come in various designs for your choice. For the same size, they can offer different pressure ranges to meet the diverse needs of your customers.

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Product Description

The surface treatment of the DIN 137A M10 Specifications Curved Spring Washers is mainly for rust prevention. Sometimes it is also done to improve appearance or to meet specific requirements for conductivity or lubrication. Different treatment methods vary significantly in terms of corrosion resistance, cost, and applicable environments.

（1）Electro-galvanizing (white zinc / blue zinc / colored zinc / black zinc)

The most commonly used economical surface treatment.

The DIN 137A M10 Specifications Curved Spring Washers treated with electro-galvanizing can provide a basic anti-rust effect, keep the surface clean, has a low cost, and is suitable for indoor normal dry environments, general machinery and electrical assembly.

（2）Blackening (oxidation blackening)

The surface turns black without increasing the size or thickness, and does not affect the assembly clearance.

The rust prevention is general. It mainly prevents oxidation, enhances appearance, and improves wear resistance. It is suitable for indoor non-corrosive regular working conditions.

DIN 137A M10 Specifications Curved Spring Washers

（3）Phosphating treatment

The surface forms a phosphating film, which adsorbs lubricating oil, making it wear-resistant, reducing friction, and preventing sticking.

The DIN 137A M10 Specifications Curved Spring Washers treated by phosphating is suitable for assembly scenarios where parts need to be repeatedly disassembled and where there are moving components.

（4）Dacromet

Highly resistant coating, resistant to salt fog, high temperature, acid and alkali, with superior rust prevention ability compared to galvanization.

The DIN 137A M10 Specifications Curved Spring Washers treated with Dacromet are suitable for harsh environments such as outdoors, humid conditions, high corrosion, chemical industries, wind power, rail transportation, etc.

（5）Stainless steel in its natural color (without additional treatment)

304/316/301 grade materials, directly finished products, without coating.

It inherently has rust and corrosion prevention properties, suitable for food, kitchen and bathroom, outdoor, and high-humidity environments.

（6）Nickel plating

The surface is shiny, has high hardness, good corrosion resistance and is not prone to discoloration.

It is mainly used in precision instruments, electrical equipment and accessories with high appearance requirements.

DIN 137A M10 Specifications Curved Spring Washers

Mon	ɸ2	ɸ2.5	ɸ3	ɸ4	ɸ5	ɸ6	ɸ8	ɸ10
d min	2.2	2.7	3.2	4.3	5.3	6.4	8.4	10.5
d max	2.45	2.95	3.5	4.6	5.6	6.76	8.76	10.93
dc min	4.2	5.2	5.7	7.64	9.64	10.57	14.57	17.57
dc max	4.5	5.5	6	8	10	11	15	18
H min	0.5	0.55	0.65	0.8	0.9	1.1	1.7	2
H max	1	1.1	1.3	1.6	1.8	2.2	3.4	4
h	0.3	0.3	0.4	0.5	0.5	0.5	0.5	0.8