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Square Head Bolt Din Standard

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DIN 931 Hexagon Head Cap Screws/Bolts Part Thread

EN 14399 (-10 Cup) Torshear Type High Strength Bolt

Zinc-Plated Carbon Steel Concrete Bolts M10 X75mm

External Tooth Lock Washers

Key words:

external tooth lock washers

10 9 grade allen bolt

10 9 vs 12 9 grade bolts

DIN 1587 Acorn Nut

Hot Dip Galvanized Flat Washer

Machine Screws

ISO 4762 Socket Head Cap Screws

Classification：

Washers

8613603303992 / 8613930004092

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Description

DIN 6797 A External Tooth Lock Washers have twisted prong teeth on the largest radius, which results in superior torsional resistance, and are the preferred tooth-type lock washer when the greatest locking ability is desired. However, they are primarily suited for large diameter heads, like pan, because the teeth must contact both the fastener and mating surface; the teeth and surface indentations they create will likely be visible. Spring steel with a zinc plated and plain finish (unplated and susceptible to rust), along with stainless steel, can be supplied. Size is nominal hole size, so select a washer that matches the screw size (if you have an M6 screw, select an M6 washer for example). They may be listed as DIN 6797 Type A.

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
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
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	6	6	6	6	6	8	8	8	8	8
per 1000 units≈kg	0.01	0.025	0.04	0.045	0.075	0.095	0.18	0.22	0.3	0.45
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
max		10.77	13.27	15.27	17.27	19.33	21.33	23.33	25.33	28.33	31.39
dc	max=nominal size		18	20.5	24	26	30	33	36	38	44	48
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	9	10	10	12	12	12	14	14	14	14
per 1000 units≈kg	0.8	1	1.6	2	3.5	3.8	5	6	8	9
For Nominal Thread Diameter	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30

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FAQ

Who are we?

Handan Yongnian Hongda fastener Manufacturing Co., Ltd. is located in Yongnian, Handan of fasteners in my country, adjacent to the Beijing-Guangzhou Line, Jingjiu Expressway and Qinghong Expressway intersection, with convenient transportation.

How do we guarantee quality?

our factory successfully passed the ISO9001:2015 international quality system certification. In the future development, the company will continue to adhere to the quality policy of "continuous improvement, striving for excellence and innovation", cooperate wholeheartedly with customers and merchants with strong technical force, equipment force and economic strength, and go hand in hand to create brilliant new achievements.

What can you buy from us?

The company mainly produces bolts, nuts, anchor bolts, screws,stud bolts ,customized special-shaped parts, etc. The products can be produced according to the national international standard (ISO), German standard (DIN), American standard ( ANSI/ASME), British standard (BS) and Japanese standard (JIS).

Why do you want to buy from us instead of other suppliers?

It has more than 20 sets of advanced equipment and an annual output of more than 10,000 tons of high-quality products. The products are sold to more than a dozen countries in the Middle East, Europe, South Korea, and Southeast Asia. "Hongda products, high quality and good price" is the production tenet of our company.

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