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Toothed Lock Washers Internal Teeth

The Factory of Xiaoguo® can provide various types of Toothed lock washers internal teeth in different materials. It can meet the different customization requirements of customers, including special sizes, special surface treatments, etc., to meet the usage needs of customers in different working environments.

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Product Description

The external tooth and internal tooth locking gaskets are two similar products designed for different application scenarios. The Toothed lock washers internal teeth is more "gentle", while the external tooth gasket is more "aggressive". The core difference between them lies in the position of the teeth, which determines their respective areas of expertise.

Comparison Toothed lock washers internal teeth External Tooth

Appearance and tooth shape The teeth are located on the inner ring of the gasket and extend inward. The teeth are located on the outer ring of the gasket and extend outward, resembling stars.

Locking principle When tightening, the teeth on the inner ring "bite" into the underside of the screw head or bolt head, providing anti-loosening friction force. When tightening, the outer ring teeth simultaneously "bite" into the surface below the head of the fastener and the installation surface of the connected component.

Main advantage No damage to the workpiece: The outer ring is smooth and will not scratch or damage the installation surface. Stronger anti-loosening performance: Double-sided interlocking, especially suitable for applications subjected to vibration and strong torsional loads.

Adaptive screw type Mainly used for screws with smaller head sizes Suitable for screws with larger heads

Main application scenarios It is commonly used for interior components and panels of automobiles, precision electronic equipment, household appliances, etc. It is widely used in fields that require stronger tightening force, such as heavy machinery, chassis, large power equipment and industrial machines that withstand high vibrations.

Installation steps

The installation of the Toothed lock washers internal teeth is very simple. The key point is that the direction should be correct.

Toothed Lock Washers Internal Teeth

（1）Confirm the specifications

Make sure that the inner diameter of the Toothed lock washers internal teeth matches the diameter of the bolt.

Check whether the teeth of the gasket are intact and without any deformation.

（2）Clean the contact surface

Wipe off the oil, paint and iron filings from the bottom of the bolt head and the surface of the workpiece.

If used for electrical grounding, make sure that the teeth of the gasket can penetrate the paint or oxide layer.

（3）Place the washer (the direction is crucial)

Put the Toothed lock washers internal teeth on the bolt.

The tooth surface must face the bolt head or nut (that is, the teeth should be oriented towards the surface of the component to be tightened).

The smooth and flat surface faces the outer side of the bolt head.

（4）Insert the bolt

Pass the bolt with the washer attached through the hole of the workpiece.

Pre-tighten the nut or bolt by hand to ensure that the threads are properly aligned.

（5）Tighten

Use a torque wrench and tighten the bolts according to the standard torque values.

During the tightening process, the teeth will automatically engage with the contact surface.

No additional adjustment of torque is required; the standard torque will suffice.

（6）Check

For electrical grounding applications, a multimeter can be used to measure the conductivity on both sides of the gasket to confirm that the teeth have pierced through the coating.

< style="text-align:center;"> Toothed Lock Washers Internal Teeth

M2	2.2	2.34	4.20	4.5	0.28	0.32
M2.5	2.7	2.84	5.20	5.5	0.37	0.43
M3	3.2	3.38	5.70	6.0	0.37	0.43
M3.5	3.7	3.88	6.64	7.0	0.47	0.53
M4	4.3	4.48	7.64	8.0	0.47	0.53
M5	5.3	5.48	9.64	10.0	0.57	0.63
M6	6.4	6.62	10.57	11.0	0.67	0.73
M7	7.4	7.62	12.07	12.5	0.77	0.83
M8	8.4	8.62	14.57	15.0	0.77	0.83
M10	10.5	10.77	17.57	18.0	0.87	0.93
M12	13.0	13.27	19.98	20.5	0.96	1.04
M14	15.0	15.27	23.48	24.0	0.96	1.04
M16	17.0	17.27	25.48	26.0	1.16	1.24
M18	19.0	19.33	29.48	30.0	1.36	1.44
M20	21.0	21.33	32.38	33.0	1.36	1.44
M24	25.0	25.33	37.38	38.0	1.45	1.55
Informtion and drawing Provided are reference only

Frequently Asked Questions

（1）How are they packaged for export?

The inner packaging consists of plastic bags and paper boxes, while the outer packaging is standard export cartons and pallets. Each Toothed lock washers internal teeth has no independent protection, but the packaging is sufficient to prevent them from scratching each other during transportation.

（2）Can internal tooth lock washers be used with countersunk screws?

Yes, but it is necessary to note that the tooth surface still needs to face the workpiece. Since the head of the countersunk screw is conical, the inner teeth of the washer may not be able to fully contact the bottom surface of the head, resulting in slightly poorer locking effect.