Countersunk External Tooth Lock Washers

The Countersunk External Tooth Lock Washers from Xiaoguo® factory adopt a conical design, just like a regular spring. They can keep steady pressing force all the time, so the connection stays tight even if parts get loose or worn out over time.

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Product Description

We choose different materials and surface finishes for Countersunk External Tooth Lock Washers, based on where and how they’ll be used, as well as performance needs, to fit all kinds of working conditions.

Spring Steel / Carbon Spring Steel

This is the most widely used and cost-effective base material.It works well for making Countersunk External Tooth Lock Washers, with good hardness, stable elasticity and decent fatigue resistance.

After heat treatment, their elasticity remains stable and they are not prone to deformation under long-term vibration.

The raw material cost is low and the overall cost performance is high.

Cast iron is prone to rust and must be treated on the surface before it can be used in humid environments.

Stainless Steel

Countersunk External Tooth Lock Washers

1.A2 (304) stainless steel

It has excellent corrosion resistance and can withstand most weak acids, weak bases, humid environments and oxidative environments.

The hardness is approximately 220 - 300 Brinell hardness, and its elasticity is lower than that of spring steel.

The surface is shiny and the material is stainless steel. Usually, no additional surface treatment is required; only passivation treatment is needed.

The 304 stainless steel Countersunk External Tooth Lock Washers is suitable for food machinery, medical equipment, indoor humid equipment and general outdoor environments.

2.A4 (316) stainless steel:

The corrosion resistance is significantly superior to 304.

Resistant to salt fog, seawater and chemical erosion, it is the preferred material for marine environments and chemical plants.

The cost is about 30% to 50% higher than 304 steel. But when used in highly corrosive conditions, it lasts far longer than regular stainless steel.

Phosphor Bronze

Phosphor bronze is an alloy made of copper, tin and phosphorus.It has no magnetism, conducts electricity well, won’t create sparks, and also stands up well to corrosion.

After being strengthened through cold processing, it still maintains good elasticity.

Although its hardness and strength are lower than those of spring steel, its overall performance is the most distinctive among the three.

The cost is higher than that of spring steel, and its elasticity is not as good as that of spring steel.

The phosphor bronze Countersunk External Tooth Lock Washers is suitable for explosion-proof electrical cabinets, oil-gas equipment, precision instruments sensitive to magnetism, and electrical grounding in seawater environments.

Countersunk External Tooth Lock Washers

Mon	φ2.5	φ3	φ3.5	φ4	φ5	φ6	φ8	φ10	φ12	φ14	φ 16
d min	2.7	3.2	3.7	4.3	5.3	6.4	8.4	10.5	13	15	17
d max	2.84	3.38	3.88	4.48	5.48	6.62	8.62	10.77	13.27	15.27	17.27
dc	5.1	6	7	8	9.8	11.8	15.3	19	23	26.2	30.2
h	0.2	0.2	0.25	0.25	0.3	0.4	0.4	0.5	0.5	0.6	0.6
Number of Number of teeth min	10	12	12	14	14	16	18	20	26	28	30