DIN7504K JIS B1124 Washer Head with EPDM Washer self tapping Screw Self Drilling Screw

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Shanghai
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TT OR LC
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50 pc
Supply Capability:
5000000 pc/month

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Item specifice:

Material: Carbon Steel,Stainless Steel Standard: ANSI,BS,DIN,GB,ISO,JIS Power Supply: AC Power,DC Power,Gasoline,Diesel
Customized: Customized,Non-Customized Surface Treatment: Polishing,Zinc Plated,Nickel Plated,Copper Plated,Chrome Plated

Product Description:

1,Specification

Standard                

GB, DIN, ISO, ANSI, ASME, IFI, JIS,BSW,AS,Q,HJ,                

Size                

According to your request                 

Materials                

1,Stainless Steel: SUS201,SUS302,SUS303, SUS304, SUS316, SUS410, SUS430                

2,CarbonSteel:C1006,C1008,C1010,C1018,C1022,C10B21,C10B33,C1035,C1045,                

C435#,40CrMo,42CrMo                

3,Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200CuZn37), C28000(CuZn40)                

4,Bronze: C51000, C52100, C54400, etc                

5,Aluminum: Al6061, Al6063 etc                

Aluminum Alloy: Al6061, Al6063 etc                

6,Titanium and Titanium Alloy: TAD,TA1-TA8,TB2,TC1-TC10                

7,Alloy steel: SCM435,C10B21,C10B33                

8,Iron:1213,12L14,1215,ect                

Surface treatment                

  • Bronze,Bronzy,red bronze, Chrome plate,color painted ,Nylok,ruspert,Magni,,Absorber Oil,Hardened,phosphate(black, Gray),Black,Zinc Plated,(green,black, white , blue , Yellow ,ROHS), Rainbow ,Plain, Nickel(black,white),Electrophoresis, Dacromet,

2:Business terms                

Report                

SGS,ROHS,                

Trade terms                

EXW, FOB,CIF,CFR                

Packing                

Packing: Poly bag, Small box, Plastic box, Carton, Pallet 25kgs/ carton, 36 cartons/ pallet. Carton dimension: 39cm*28cm*13.5cmpallet dimension: 100cm*100cm*80according to the customer’s requirement                

Payment terms                

TT 30% deposit in advance, 70% Balance Before shipment,                

100% LC at sight,Western Union.                 

 Ali- pay                

Sample terms                

Sample free offered if available in stock,otherwise there will be sample charge                

3. Quality control systems

Quality Certification                

SGS,ROHS,                

ISO9001:2008, ISO14001:2004                

quality system                

100% of full line testing system, keep with the international standard                

Inspection equipment                

Caliper, Microcline, Torsion meter, Salt atmosphere testing machine, Ring gauge, General gage, sclerometer, Projector, die gage, image screening instrument                


4. Company general impression 

 

DIN7504K JIS B1124 Washer Head with EPDM Washer self tapping Screw Self Drilling Screw

Company cover                

5000 square meter                

Employee                

80-100 people                

Equipment                

50 sets                




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Q:What is the meaning of the 8.8 on the screw
4.8 and 8.8 refer to the performance level of the bolt. Other bolt headers are 10.9 and 12.9. The higher the level, the better the performance of both bolts. 4.8 is defined as: 4 represents 4 * 100 = 400MPa, refers to the tensile strength of bolts 400MPa, .8 for the yield ratio of 0.8, the nominal yield strength of 400 × 0.8 = 320MPa 8.8 grade bolts performance: tensile strength = 800MPa, yield strength = 800 * 0.8 = 640MPa
Q:Why should the screw twist clockwise?
Most of the world's people are right-handed, right-handed twist the right-hand screw more smoothly.
Q:Is the tail screw? If it is mainly used in what place? If not what are they different?
Normally, it should be called drilling screws, screws are the use of the object of the circular circular rotation and friction of the physical and mathematical principles, step by step to tighten the tools of the tools. Drilling screw is the front of the screw with self-tapping the head of the wood screws. Screw is thousands of years of people in the production of common inventions, according to the application field, it is the first major inventions of mankind. Drilling screws are in recent years people's new invention, also known as self-tapping screws. Main steel for connecting between the need for ordinary or high-strength bolts, plates with self-tapping screw connection. It can not be used for metal and metal bonding.
Q:What screw can get into the iron?
Self tapping screw is a screw, on, do not have to pre-open the thread, it will spin out the thread, the Chinese name "self-tapping screws."
Q:No cross screwdriver, how can the screwdriver screwdriver?
If the head of the screw is fully exposed, use a large pliers to tighten the screw head from the side and turn the screw to the right.
Q:The Symbolic Meaning of Screw
The "crazy screw" is in the life and employment under the dual pressure, long-term super-strength, over time limit of labor, the spirit of life, , Constantly challenge the physical and psychological limits of a group of people, they bear the hard work day and night, physically and mentally tired tired, gather more away from the family, is the new era of labor and employment environment of a deformed landscape.
Q:Who knows who invented the screw?
The spirits were invented more than 2,000 years ago, but less than 500 years for fixing things. The first person who describes the spiral is the Greek scientist Archimedes (about 287 BC - 212 BC) The Archimedes spiral is a huge spiral in a wooden cylinder used to The water is raised from one level to another, and the fields are irrigated. Its true inventor may not be Archimedes himself. Maybe he just described something that already existed. Perhaps it was the ancient Egyptian craftsmen who had designed it to use the irrigation on both sides of the river. Archimedes spiral in the ancient society are used to raise water, no one considered to change it into a fixed piece. Archimedes spirals are widely used for water lifting. For example, the Romans used it to drain the mine. In the Middle Ages, carpenters used wooden nails or metal nails to connect furniture and wooden structures. In the 16th century, nail workers began to produce spiral nails, these nails can be more firmly connected things. It was a small step from this nail to the screw. At the end of the eighteenth century, screws were quite popular as fixed parts, because at that time a cheap production method had been found. Screwdriver (chisel) appeared in London around 1780 years. The carpenter found that screwing the screw with a screwdriver was better than a hammer and could fix something better, especially when a fine screw was encountered.
Q:The screw is too tight not how to do it
T-shaped irons and screws, you can twist it off
Q:Is the screw a bevel?
Belong to, the slope is equal to the thread pitch than the upper circumference of the screw
Q:Why are the screws of the screw?
Fine thread thread pitch is small, the angle is small, self-locking is better, high strength, because the teeth are not wearable, easy to slip. Fine thread is often used in fine parts, thin-walled pipe fittings or by the impact, vibration and variable load connection, can also be used as fine-tuning mechanism for adjusting the thread.

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