Fasteners: T-Head Bolt & 316 Wing Screws

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100000 pc
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10000000 pc/month

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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)

  • Brand Name: CMAX

Packaging & Delivery

Packaging Details:box,carton,pallet
Delivery Detail:30days or advance

Specifications

Thread forming screws

Material:Steel or stainless steel
According to drawing

 

 

 

 

 

1,Products Detailes
Productsbolt,screw,nut,washer,pin,rivet and non-standard fastener
SizeStandard and Non-standard according to drawing or samples
Machinesauto pressing machines, automatic heading machine, cold header high-precision surface grinder machine, involantary grinder machines,Digital Micro Vickers Hardness tester, Electrolytic metrical thickness gauge, Vision Measuring Machine,Fischer Scope X-ray Thickness Gauge and so on
Material1.Stainless Steel: SS201, SS303, SS304, SS316, SS410, SS420
2,Steel:C45(K1045), C46(K1046),C20
3.Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58),
C27200CuZn37), C28000(CuZn40)
4.Bronze: C51000, C52100, C54400, etc
5.Iron: 1213, 12L14,1215
6.Aluminum: Al6061, Al6063 etc
7,.Carbon steel: C1006,C1010,C1018,C1022,C1035K,C1045
8, Alloy steel: SCM435,10B21
Surface FinishingZn- Plated,Ni-plated,Passivated,Tin-plated,Sandblast and Anodize,Chromate, Polish,Electro Painting,Black Anodize,Plain,Chrome plated,Hot Deep Galvanize(H. D. G. ) etc.
Heat TreatmentTempering,Hardening,Spheroidizing,Stress Relieving.
StandardISO,GB,DIN,JIS,ANSI,BSW
Manufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/Baking/QA/Package/Shipping
Sample we can supply the samples for free,if the samples we have in stock
Lead time10-15 working days as usual,It will based on the detailed order quantity.
Carton size36*24*16 CM &36*24*12 CM
Pallet size110*100*90 CM
Warrantywe confirm our goods will satisfy your request of 100%
After sales servicewe will follow up goods for every customer and help solve problem after sales.

 

 

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Q:Why the screw thread more closely, spin into the more effort?
This is due to the spiral angle of the thread becomes smaller, the pitch of the thread, the lead becomes smaller.
Q:What is the effect of the screw?
The set screw is mainly used to hold the relative position between the two parts. We call the "head screw", the role of the equivalent of the role of positioning pin.
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:How is the screw produced
Annealing: the wire heated to the appropriate temperature, to maintain a certain time, and then slowly cooling to adjust the crystal structure, reduce hardness, improve the room temperature processing. Pickling: Remove the oxide film on the surface of the wire and form a layer of phosphate film on the metal surface to reduce the wire drawing and cold pier or forming process. To the required diameter. Practical for some products can be divided into coarse pumping (shelling) and fine pumping two stages. Molding: The wire is forged by cold forging (or hot forging) to achieve the shape and length (or thickness) of the finished product. The finished semi - finished product is rolled or tapped to achieve the desired thread. Practical for the bolt (screw) known as the rolling teeth, teeth known as the rolling teeth, nuts called tapping. Heat treatment: according to the object and the purpose of different different heat treatment can be used. Quenched and tempered steel: quenched high temperature tempering (500-650 ℃) spring steel: quenched after tempering temperature (420-520 ℃) ​​carburizing steel: carburizing after quenching and then low temperature tempering (150-250 ℃) low carbon and In the carbon (alloy) steel quenched into martensite, with the tempered temperature rise, the general rule is the strength decreased, while the plasticity, toughness rise. Surface treatment: surface treatment that is through a certain method in the workpiece surface coating process, the purpose is to give the product surface appearance, anti-corrosion effect.
Q:How do I install the screws correctly?
Expansion screw installation method to expand the screw on the ground or wall holes in the hole, with a wrench to tighten the nuts on the expansion bolts, bolts to go out, while the outside of the metal sleeve is not moving, so the bolt under the bulk of the metal Set up to keep it full of holes, this time, the expansion of the bolt on the expansion of the expansion screw is to make the duct support, hanging, bracket fixed to the wall, the floor, the column used in a special thread connection Pieces. Consists of countersunk head bolts, expansion tubes, flat washers, spring mats and hex nuts. When used, you must first use the impact of electric drill (hammer) in the fixed body on the corresponding size of the hole, then the bolt, expansion tube into the hole, tighten the nut to bolts, expansion tube, the installation and expansion between the fixed body Tight into one. Expansion of the expansion of the principle of expansion of screws is to use the pull out of the slope to promote the expansion of friction caused by clamping force, to achieve a fixed effect. Screw head is a thread, a vertebral. Outside the package of a metal, metal cylinder half of a number of incision, put them together thrown into the hole in the wall, and then lock the nut, Luo mother pull out the screw, the vertebral pull into the metal cylinder, metal cylinder was Open up, so tightly fixed on the wall, generally used for fence, rain Peng, air conditioning and other cement, brick and other materials on the fastening. But its fixation is not very reliable, if the load has a greater vibration, may be loose, it is not recommended for the installation of ceiling fans and so on.
Q:Is the screw a bevel?
Of course, there are slope, as well as self-locking phenomenon, such as self-locking nut
Q:Is the tail screw? If it is mainly used in what place? If not what are they different?
This kind of screw called what I really do not know its name, the use of the place to see really not much, I see the place are generally used in machinery and equipment above, as you said what role, my personal point of view is To prevent slipping, because it is the head of a large slip wire, need to hand to adjust to the correct position to fall off, know that so much, not professional, Oh ~ hope to help you! The
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:How did the screw twist?
maintenance personnel with a large number of screwdriver three five in addition to get the two, he told me that the screwdriver should be used by the small model to the large model too, of course, I did not let you frequently change the screwdriver, but began to have too large Easy to spend, began to use a small easy to spend. Large screwdriver only after the screw has been spent on the stage.
Q:Who knows who invented the screw?
The use of the slope of the principle of the slope, with a small force can push up the heavy objects, as shown in Figure 1; human history for the first time the record of the helix design is appeared in the second century BC, was applied to improve Water level, irrigation, pumping equipment, known as water screws, so the inventor of water screws - - Archimedes (287-212 BC) is recognized as the father of screws

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