Manufacturer DIN6797 67978 External Internal Serrated Toothed Lock Washers Spring Steel Zinc

OEM.ODM is available Greencate is acceptable for us 
We can design drawings according to your samples, or make samples according to your drawings.
We need more detail as follow with many thanks. This will allow us to give you an accurate quotation if you need customized.
• Product:
• Material:
• Class grade:
• Order Quantity:  
• Surface treatment:
• When do you need it by?
• Where to Shipping (Country with postal code please) :
• Measure: Inside Diameter/Outside Diameter/Thickness/Length:                DIN9021 M10 Large plain washers/flat washer
• Email your drawing ( jpg, png or pdf, word) with minimum 300 dpi resolution for good clarity.

Size			2.2	2.7	3.2	3.7	4.3	5.3	6.4	7.4	8.4	10.5
d	min=nominal size		2.2	2.7	3.2	3.7	4.3	5.3	6.4	7.4	8.4	10.5
	max		2.34	2.84	3.38	3.88	4.48	5.48	6.62	7.62	8.62	10.77
dc	max=nominal size		4.5	5.5	6	7	8	10	11	12.5	15	18
	min		4.2	5.2	5.7	6.64	7.64	9.64	10.57	12.07	14.57	17.57
t			0.3	0.4	0.4	0.5	0.5	0.6	0.7	0.8	0.8	0.9
Number of Teeth			6	6	6	6	8	8	8	8	8	9
per 1000 units≈kg			0.04	0.045	0.045	0.085	0.1	0.2	0.25	0.35	0.55	0.9
For Nominal Thread Diameter			M2	M2.5	M3	M3.5	M4	M5	M6	M7	M8	M10
Size			13	15	17	19	21	23	25	28	31
d	min=nominal size		13	15	17	19	21	23	25	28	31
	max		13.27	15.27	17.27	19.33	21.33	23.33	25.33	28.33	31.39
dc	max=nominal size		20.5	24	26	30	33	36	38	44	48
	min		19.98	23.48	25.48	29.48	32.38	35.38	37.38	43.38	47.38
t			1	1	1.2	1.4	1.4	1.5	1.5	1.6	1.6
Number of Teeth			10	10	12	12	12	14	14	14	14
per 1000 units≈kg			1.2	1.9	2.4	3.7	4.1	6	6.5	8.5	9.5
For Nominal Thread Diameter			M12	M14	M16	M18	M20	M22	M24	M27	M30

Shanghai Gentleman hardware Co., Ltd. always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world. Besides DIN standard products we supply also ex stock according to ISO, UNC, UNF, BSW (whit worth), BSF, ASTM and ANSI standards. Above all, our well known specialty is the delivery of deviating sizes and materials to sample or drawing. All Metal is known in the market as the specialist for special fasteners.
Hexagon head bolts and socket cap screws are also standard available in the higher grades 10.9 and 12.9. The plating company guarantees excellent finished products: electrolytic (blue, yellow or black passivized) and hot dip galvanizing are the most common standard surface treatments. But also e.g. The best surface treatment of Greencate may be applied.
Besides our focus on the machine and equipment construction we deliver to a great variety of industries like shipbuilding, petrochemical industry, furniture and electronically manufacturing. We can produce quickly in relatively small series for our Cooperation partner worldwide.
Our international trade company is located in Shanghai city which is very close to the Shanghai seaport and airport, can save a lot of transportation and time costs. And our Technical Engineer have 34 years' experience in fasteners, these are how we keep superior quality and competitive offers for global valued customers.
We have good reputation in fasteners field with our long business customers because we always adhere to the principle of leading technology, quality first, customer first, and grow together with our partners around the world.
And i have been in the import and export industry for more than 15 years then can save costs from transportation, products, etc., while controlling product quality, so that you can achieve your company target.

Q:Are you a manufacturing company or trading company? 
A: Our factory are specialized in manufacturing fasteners more than 40 years and our sales company have exporting experience for more than 16 years.

Q: Wonder if you accept small orders?
A: Do not worry. Please feel free to contact us, in order to give our clients more convenience, we accept small order.

Q: How can I get a sample to check your quality?
A: After price is confirmed, you can require samples to check our quality. Free for stock samples, but freight collect. For sample making, we will charge a sample fee. Sample fee will be confirmed according to the products' craftwork.

Q: How can I customize my products? 
A: Attach your drawings with details. (Surface, treatment, material, quantity and special requirements etc.) . And we can print your logo according to your request and Brand Authorization Letter

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is according to quantity.

Q: What is your payment term?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30%-70% T/T in advance (depending on different situations.), balance before shipment.

Q: What's your packing?
A: Our Normal packing is bulking in Cartons, 20-25kgs/carton, 36cartons/ pallet. We also can pack products according to your requirement.

Q: Do you have after-sales service?
A: Certainly, you can contact us at any time. And we are very confident in our products, we pack them very well to make sure the goods in well protection to avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don't forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest. if it is our problem we will responsible for it.

Please feel free to contact us for detailed information.