Screw Standard Flat Washer

As the supplier of Screw Standard Flat Washer, Xiaoguo® offers products that have passed rigorous testing. During operation, our products can effectively distribute the locking force evenly across a larger contact surface, preventing material deformation.

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Product Description

A Screw Standard Flat Washer is a mechanical part in the shape of a flat circular ring, with a hole in the middle. It is usually made of metal (such as carbon steel, stainless steel) or non-metallic materials (such as nylon, rubber). It is placed between the surface of the bolt, nut and the connected component, and is an indispensable auxiliary part in a simple fastening system.

Specification Dimensions

Our Screw Standard Flat Washer are produced in strict accordance with international standards, ensuring that they can be compatible with other fastening components when used by customers.

The following is a comparison table of common specification sizes based on the DIN 125/ISO 7089 standard:

Nominal specification (bolt diameter)	Inner diameter d (mm)	Outer diameter D (mm)	Thickness t (mm)
M6	6.4	12	1.6
M8	8.4	16	1.6
M10	10.5	20	2.0
M12	13.0	24	2.5
M16	17.0	30	3.0

Core function

Screw Standard Flat Washer are the reliable "backstage heroes" at every connection point, quietly performing crucial functions such as distributing pressure and protecting surfaces.

（1）Distribute the pressure and protect the workpiece

By increasing the contact area between the nut or bolt head and the workpiece surface.The clamping force can be distributed more uniformly across the workpiece, thereby preventing surface indentation, deformation, or damage.

（2）Reduce friction and protect the surface coating

As a smooth barrier layer,It prevents scratches on the workpiece's surface coating caused by rotation or friction while tightening nuts or bolts.

（3）Auxiliary anti-loosening, stable connection

（4）Flat washers provide a stable, flat supporting surface for lock washers (such as spring washers).Furthermore, it increases the friction at the contact surface to a certain extent, thereby helping to enhance the fastener's resistance to vibration.Fill the gap In the use of precision instruments, the axial gap between components can be finely adjusted by adding or reducing the number of Screw Standard Flat Washer.

（5）Special materials can achieve different functions.

Insulation: Nylon or plastic can effectively prevent current from passing through and avoid short circuits.

Sealing: Rubber or soft metals can fill the gaps when under pressure, preventing the leakage of liquids or gases.

Anti-corrosion: Stainless steel or galvanized material can resist corrosion and extend the service life.

Screw Standard Flat Washer

Mon	φ 16	φ 18	φ20	φ22	φ24	φ27	φ30	φ33	φ36	φ39	φ42
d max	17.27	19.33	21.33	23.33	25.33	28.33	31.39	34.62	37.62	42.62	45.62
d min	17	19	21	23	25	28	31	34	37	42	45
dc max	30	34	37	39	44	50	56	60	66	72	78
dec min	29.48	33.38	36.38	38.38	43.38	49.38	55.26	58.8	64.8	70.8	76.8
h max	3.3	3.3	3.3	3.3	4.3	4.3	4.3	5.6	5.6	6.6	9
h min	2.7	2.7	2.7	2.7	3.7	3.7	3.7	4.4	4.4	5.4	7