Stainless Steel Spring Washer - Grade 202, 304, 316, A2, A2-70

Unlike flat washers, spring washers have a curved or angled shape that allows them to exert a spring force and prevent loosening caused by vibrations or thermal expansion. Along with distributing the load of a fastener and protecting the mating surface, their main purpose is to retain tension and keep everything secure in dynamic situations.

Spring Lock Washer Sizes and Dimensions

Bolt Size	Top Outside Diameter (A)	Bottom Outside Diameter (B)	Thickness (T)	Weight (grams)
1/2	1-1/4	2-1/4	1/8	45
5/8	1-1/2	2-1/2	5/32	60
3/4	1-3/4	2-3/4	3/16	80
7/8	2	3	7/32	105
1	2-1/4	3-1/4	1/4	135
1-1/8	2-1/2	3-1/2	5/16	200
1-1/4	2-3/4	4	3/8	240
1-1/2	3	4-1/2	7/16	350

Key Features

Feature	Description
Type	Split (helical), conical (Belleville), wave, or crescent
Function	Provides axial load to resist loosening from vibration or dynamic forces
Shape	Typically a helical ring (split) or wavy/conical profile
Material	Carbon steel, stainless steel, spring steel, phosphor bronze
Surface Finishes	Zinc plated, black oxide, phosphate coated, plain
Standards	DIN 127, DIN 7980, IS 3063, ANSI/ASME B18.21.1

A spring washer, also known as a split lock washer, is a type of washer designed to prevent loosening of fasteners due to vibration or torque. Unlike flat washers, spring washers exert a continuous force, maintaining tension and grip in bolted assemblies.

Material

Stainless Steel (304/316)

Inner Diameter

6.4 mm

Outer Diameter

25 mm to 30 mm

Thickness

1.5 mm to 2 mm

Spring Action

The unique shape of a spring washer enables it to compress and exert a spring force when under load. This function assists in keeping tension in the fastener assembly.

Vibration Resistance

Spring washers excel at preventing fasteners from loosening due to vibration, thanks to their ability to absorb and neutralize the energy produced by the vibrations.

Thermal Expansion and Contraction

In addition, they aid in adjusting for variations in size caused by temperature changes, ensuring a steady level of tension in the joints.

Load Distribution

Although they are not primarily intended for distributing load like flat washers, they do contribute to spreading the clamping force across a wider surface.

Types

There are different types of spring washers available, such as conical, wave, split, and cupped versions. Each variation possesses unique qualities and is suitable for specific uses.

Material Compatibility

Choosing spring washers made from materials compatible with both the fastener and the application environment is crucial in preventing corrosion.

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