M3 External serrations Lock Washers

The M3 External serrations Lock Washers produced by the Xiaoguo® factory have good reusability. If the outer teeth of the washers are slightly worn after use, they can be reused at non-critical locations depending on the situation.

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Product Description

Although the M3 External serrations Lock Washers is small in size, it has a wide range of applications. With its compact structure, reliable locking force and conductivity, it plays an important role in many fields.

（1）Robots, precision machinery

Bolt fastening for high-precision and high-vibration equipment such as industrial robot joints, motor brackets, and linear modules

（2）Consumer electronics

The frame of mobile phones, the motor mounts of drones, the support structures for VR/AR devices, the internal structures of game controllers, etc., all these high-strength and miniaturized connection points

（3）New energy industry

M3 External serrations Lock Washers are used in key scenarios within charging stations, such as electrical modules, energy storage battery pack modules, and photovoltaic inverters, where corrosion resistance and vibration resistance are required.

（4）Furniture and office supplies

Anti-loosening measures for the connection between the base and backrest of office chairs, metal shelves, display cabinets, lighting fixtures, etc. during the disassembly and assembly processes

（5）Optical and photographic equipment

The internal adjustment mechanisms, lens supports, pan-tilt fasteners, etc. of precision instruments have the demand for small-sized and high-strength connections

M3 External serrations Lock Washers

Size		1.7	2.2	2.7	3.2	3.7	4.3	5.3	6.4	7.4	8.4
d	min=nominal size	1.7	2.2	2.7	3.2	3.7	4.3	5.3	6.4	7.4	8.4
d	max	1.84	2.34	2.84	3.38	3.88	4.48	5.48	6.62	7.62	8.62
dc	max=nominal size	3.6	4.5	5.5	6	7	8	10	11	12.5	15
dc	min	3.3	4.2	5.2	5.7	6.64	7.64	9.64	10.57	12.07	14.57
	t	0.3	0.3	0.4	0.4	0.5	0.5	0.6	0.7	0.8	0.8
Number of Teeth	min	9	9	9	9	10	11	11	12	14	14
per 1000 unitsskg		0.02	0.03	0.045	0.06	0.11	0.14	0.28	0.36	0.5	0.8
For Nominal Thread Diameter		M1.6	M2	M2.5	M3	M3.5	M4	M5	M6	M7	M8

Size		10.5	13	15	17	19	21	23	25	28	31
d	min=nominal size	10.5	13	15	17	19	21	23	25	28	31
d	max	10.77	13.27	15.27	17.27	19.33	21.33	23.33	25.33	28.33	31.39
de	max=nominal size	18	20.5	24	26	30	33	36	38	44	48
de	min	17.57	19.98	23.48	25.48	29.48	32.38	35.38	37.38	43.38	47.38
	t	0.9	1	1	1.2	1.4	1.4	1.5	1.5	1.6	1.6
Number of Teeth	min	16	16	18	18	18	20	20	20	22	22
per 1000 unitsskg		1.25	1.6	2.3	2.9	5	6	7.5	8	12	14
For Nominal Thread Diameter		M10	M12	M14	M16	M18	M20	M22	M24	M27	M30

Core Strengths

The M3 External serrations Lock Washers can be used in so many scenarios mainly due to its several strong features.

（1）Anti-vibration and anti-loosening

The M3 External serrations Lock Washers is a professional tool for resisting vibration. Its external tooth structure is designed specifically to "prevent fasteners from loosening in a vibrating environment", especially in equipment with dynamic loads and continuous motion.

（2）Electrical grounding

The sharp teeth can easily penetrate the oxide layer or coating on the metal surface, creating a stable electrical path.

（3）Space-friendly

For the interior of precision equipment, the M3 External serrations Lock Washers can be directly installed below the head of the fastener, occupying almost no additional space.

（4）Material options are available

People can choose different materials based on the specific application environment. Spring steel has high strength, and stainless steel is resistant to rust, making it suitable for various scenarios.

M3 External serrations Lock Washers