304 stainless steel internal and external tooth washers

Short Description:

The main feature of the internal tooth washer is that it has a tooth structure on the inner circumference. The tooth structure of the external tooth washer is distributed on the outer circumference of the washer. These teeth are usually distributed equidistantly, and the shape of the teeth can be triangular, rectangular, etc. For example, in some mechanical connections, triangular internal teeth can provide a better bite effect. The overall thickness varies according to different usage requirements.

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DIN 6797 Tooth lock washers size reference

For thread	d1		d2		s	Teeth	Weight kg/1000pcs Type A	Weight kg/1000pcs Type J
For thread	Nominal size min.	max.	Nominal size max.	min.	s	Teeth	Weight kg/1000pcs Type A	Weight kg/1000pcs Type J
M2	2.2	2.34	4.5	4.2	0.3	6	0.025	0.04
M2.5	2.7	2.84	5.5	5.2	0.4	6	0.04	0.045
M3	3.2	3.38	6	5.7	0.4	6	0.045	0.045
M3.5	3	3.88	7	6.64	0.5	6	0.075	0.085
M4	4.3	4.48	8	7.64	0.5	8	0.095	0.1
M5	5.3	5.48	10	9.64	0.6	8	0.18	0.2
M6	6.4	6.62	11	10.57	0.7	8	0.22	0.25
M7	7.4	7.62	12.5	12.07	0.8	8	0.3	0.35
M8	8.4	8.62	15	14.57	0.8	8	0.45	0.55
M10	10.5	10.77	18	17.57	0.9	9	0.8	0.9
M12	13	13.27	20.5	19.98	1	10	1	1.2
M14	15	15.27	24	23.48	1	10	1.6	1.9
M16	17	17.27	26	25.48	1.2	12	2	2.4
M18	19	19.33	30	29.48	1.4	12	3.5	3.7
M20	21	21.33	33	32.38	1.4	12	3.8	4.1
M22	23	23.33	36	35.38	1.5	14	5	6
M24	25	25.33	38	37.38	1.5	14	6	6.5
M27	38	28.33	44	43.38	1.6	14	8	8.5
M30	31	31.39	48	47.38	1.6	14	9	9.5

DIN 6797 Key Features

The biggest feature of DIN 6797 washers is their special tooth structure, which is divided into two types: internal tooth (Internal Tooth) and external tooth (External Tooth):

Internal tooth washer:

● The teeth are located around the inner ring of the washer and are in direct contact with the nut or screw head.
● Applicable to scenarios with small contact area or deep threaded connection.
● Advantage: Better performance in situations where space is limited or hidden installation is required.

External tooth washer:

● The teeth are located around the outer ring of the washer and tightly engage with the installation surface.
● Applicable to scenarios with large surface installation, such as steel structures or mechanical equipment.
● Advantage: Provides higher anti-loosening performance and stronger grip of the teeth.

Function:
● The tooth structure can effectively embed into the contact surface, increase friction, and prevent rotational loosening, especially suitable for vibration and impact conditions.

Material Selection

DIN 6797 washers are made of different materials depending on the use environment and mechanical requirements:

Carbon steel
High strength, suitable for mechanical equipment and heavy industrial applications.
Usually heat treated to enhance hardness and wear resistance.

Stainless steel (such as A2 and A4 grades)
Excellent corrosion resistance, suitable for humid or chemically corrosive environments, such as marine engineering or food industry.
A4 stainless steel is particularly suitable for highly corrosive environments (such as salt spray environments).

Galvanized steel
Provides basic corrosion protection while maintaining cost-effectiveness.

Other materials
Customized copper, aluminum or alloy steel versions are available for scenarios with conductivity or special strength requirements.

DIN 6797 Surface Treatment of Washers

● Galvanizing: provides an anti-oxidation layer suitable for outdoor and general industrial use.

● Nickel plating: enhances surface hardness and improves appearance quality.

● Phosphating: used to further improve corrosion resistance and reduce friction.

● Oxidation blackening (black treatment): mainly used to improve surface wear resistance, commonly used in industrial equipment.

Packaging and Delivery

Angle Brackets

Elevator installation accessories delivery

Elevator Mounting Kit

Elevator Accessories Connection Plate

Wooden Box

Packing

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FAQ

Q: How to get a quote?
A: Our prices are determined by workmanship, materials and other market factors.
After your company contacts us with drawings and required material information, we will send you the latest quotation.

Q: What is the minimum order quantity?
A: The minimum order quantity for our small products is 100 pieces, while the minimum order number for large products is 10.

Q: How long do I have to wait for shipment after placing an order?
A: Samples can be supplied in approximately 7 days.
Mass-produced goods will ship within 35-40 days after receiving the deposit.
If our delivery schedule does not match your expectations, please voice an issue when inquiring. We will do everything we can to fulfill your requirements.

Q: What are the payment methods you accept?
A: We accept payments via bank account, Western Union, PayPal, and TT.