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Lock Washers help achieve tight assemblies by providing good bolt tension per unit of applied torque, with uniform torque control and even load distribution. These washers perform with a type of spring action created by pressure from a slight spiral or helical form. Upward and downward bent projections on respective sides of the split allow the washer to grasp adjoining materials, which helps prevent components from loosening under vibration or corrosion.
Steels are designated by a 4 number SAE Steel grade.  The first two digits indicate the primary materials used to form the steel.  The last 2 digits identify the percentage of carbon for the alloy (in hundredths).  The steel used in these fasteners has a tensile strength ranging from 100,000 to 150,000 psi (pounds per square inch).  Zinc Plating helps to prevent corrosion.
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Chemical Components:
Material
C
Si
Mn
P
S
Ni
Cr
Mo
Other
201
0.15
1
5.5-7.5
0.06
0.03
3.5-5.5
16-18
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N≤0.25
304
0.08
1
2
0.045
0.03
8.0-10.0
18-20
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Â
304L
0.03
1
2
0.045
0.03
8.0-12.0
18-20
Â
Â
321
0.08
1
2
0.045
0.03
8.0-13.0
17-19
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Ti≤5*C%
316
0.08
1
2
0.045
0.03
10.0-14.0
16-18
2-3
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316L
0.03
1
2
0.045
0.03
10.0-15.0
16-18
2-3
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309S
0.08
1
2
0.045
0.03
12.0-15.0
22-24
Â
Â
410
0.15
Â
1
Â
0.03
-
11.5-13.5
Â
Â
420
0.26-0.4
Â
1
Â
0.03
-
12-14
Â
Â
430
0.12
0.75
1
0.04
0.03
-
16-18
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About Our Products:
Main products
 Bolts,Screws,Nuts,Washers,Pins,Rivet,Sleeve, Shaft,CNC precision parts
Size Range
Diameter:M2---M64Â Â Â Length:5mm---400mm(Customized is acceptable)Â Â Â
Diameter:6#---2inch,  Length:1/2inch---30inch(Customized is acceptable)  Â
Standard
ANSI,UNI,DIN,BS,JIS,AS,GB,ISO,EN
Material
Normal stainless steel;Super Alloy Stainless Steel
Grade
A2-50;A2-60;A2-70;A4-60;A4-70;A4-80,Gr 8, Gr8M
SS201,SS 202, SS301,SS303,SS304, SS304L, SS316, SS316L, SS317L, SS321;SS410,SS 420,SS347;SS347H;SS310S\2520,
and super alloy: 1.4529, 1.4539, 1.4980(alloy 286), 2.4602, 2.4605, 2.4610, 2.4952 (Nimonic 80A), 2.4819, Incoloy (825\800\800H), Inconel (600\601\625\718), Monel400, etc
Surface
self finish plain,minor polish, satin polish, black oxide,Electro Painting,
Others
 Non-standard/standard/OEM/ODM/Customized service are provided.
We Promise:
1. Hight quality;
2. Competitive price;
3. The shortest delivery;
4. The fastest response;
5. Best service.
The Advantage:Â
1.Many products: Any type of stainless steel hardware can be supplied.
2.Good Service: We treat clients in great honest and sincere management is our top mission.
3..Good Quality: We have strict quality control system .Good reputation in the market.
4.OEM Accepted: We can produce as per your drawings or samples.
5.Shortest Delivery: We have large stock, 3 days for stock items,7-15days for production.
6.Low MOQ: It can meet your business very well.Â
Sample Charge:
1.Samples charge: According to your request.   Sampling time: 5-7days
2.Samples charge: Free for Existing Mold.    Sampling time: 3days
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Packing Information:
1.Carton Size: 25*16*25CM;
2.Wooden Pallet/Case Size: 110*90*80CM;
3.Color Printed Box&Cartons can be made per customers' desire.
Delivery:
By Express
1kg-50kg
By Air
50kg-500kg
By Sea
500kg or more
We have a wider range of processing choices for transportation mode
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By Express ( FedEx, UPS, DHL, TNT, EMS, etc... )
--- Advantage: Fast ( takes about 7 - 10 days in the delivery ), door to door
--- Disadvantage: A little expensive
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By Air Transportation
--- Advantage: Fast ( takes about 8 - 12 days ), a little cheaper than Express.
--- Disadvantage: You need to take the goods from the airport by yourself.
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By Sea ( Ocean ) Transportation
--- Advantage: Much cheaper than Express or Air transportation.
Disadvantage: Slow and you need to take the goods from your destination port by yourself.
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Company Information:
Hand Industrial  Ltd is established in 2010, and one professional manufacturer and supplier of stainless steel hardware. Our products contains stainless steel bolts and thread studs, stainless steel machine screws,stainless steel tapping screws and self drilling screws in different material from SS 304,SS 316,SS 316L,SS410,etc. We often make DIN. ANSI. BS. ISO. JIS standard and OEM service is available. Our products are very popular in European, Australia, North America, Mideast, and South East Asia and some African countries.
We can supply different size of SS hex cap bolts\hex socket cap screws\hex flange bolts\tapping screws\drilling screws.
We can supply different sizes of SS hex dome head cap nuts\hex nuts\flange nuts\hex cap nuts\hex welding nuts.
Internal Tooth 410 Stainless Steel Lock Spring Washer
Internal Tooth 410 Stainless Steel Lock Spring Washer