STAINLESS STEEL SELF DRILLING SCREW in STANDARD and NONSTANDARD SIZES

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Shanghai
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TT OR LC
Min Order Qty:
1000 pc
Supply Capability:
100000000 pc/month

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Product Description:

1,description of the stainless steel self drilling screw in standard and nonstandard sizes

STAINLESS STEEL SELF DRILLING SCREW in STANDARD and NONSTANDARD SIZES

2, the products show

STAINLESS STEEL SELF DRILLING SCREW in STANDARD and NONSTANDARD SIZES

 

3,OUR ADVANTAGE AND SPECIFICATION

1.    Our company has been dedicated to producing stainless steel screw, owning complete producing technology and abundant managing experience.

2.    The raw material such as mother tube, round bar we use is from Chinese biggest and well-known steel mill

3.    We have advanced NDT equipments for the tests such as Eddy Current test, Ultrasonic test, Hydraulic test and so on.

4.    We have ISO 9001 and PED certificate, and the Third Party Inspection Certificates such as TUV, BV, Lloyd’s, SGS, etc, also can be provided according to customers’ requirements,

5.    Wooden case package which is strong and suitable for sea transportation is our main method to pack the pipes. And the economical packing method such as packed in bundles is also welcomed by some customers.

6.    The tolerance control we use is D4/T4 (+/-0.1mm) on both inside and outside Diameter and Wall Thickness, which is much higher than international standard ASTM, DIN.

7.    The surface condition is one of our main advantages: in order to meet different requirements for surface condition, we have annealing and pickling surface, bright annealing surface, OD polished surface, OD & ID polished surface etc.

8.    In order to keep the inside surface of pipe clean and make it free from deburring, our company develops the unique and special technology --- Sponge Washing with high pressure.

9.    We have complete after-sale service to deal with the problems in time.

 

4,FAQ

Q: WHAT ARE YOUR ADVANTAGES?

A: 1. We have a specialized team in dealing with all the documents required by customers. We aim to zero error to save money and time for client. 2. We have a strict quality control from production to delivery. 3. We take use of advanced system and tool to improve working efficiency and control every step. 4. Professional sales team to serve customers. 5. Samples can be provided as your requirements. 6. Professional packing team which keep every packing safely.

Q: WHAT ARE YOUR MAIN PRODUCT?

A: We are specializing in providing cold rolled 201/410/430 Stainless Steel Coil / Stainless Steel Strip / Stainless Steel Sheet / Stainless Steel Plate, Stainless Steel Circle, Stainless Steel tube / Stainless Steel Pipe Sheets. 

Q: CAN I GET FREE SAMPLE?

A: YES. We can provide free sample. However, you should be responsible for the transportation freight. Please tell us your express account or please send us the transportation freight of samples firstly, then we can arrange sample delivery.

Q: HOW MUCH THE TRANSPORTATION FREIGHT WILL BE FOR THE SAMPLES?

A: The freight depends on the weight and packing size and your area.

 

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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:Screw production process is how the kind of
This is very simple, the screw wire is generally based on the size of the screw into the back, and then according to the order processing, starting - rubbing teeth - plating - packaging on the success
Q:How does the screw rust die?
1 shock: for the rusty screws, do not use a wrench hard to prevent the screw screw six edges and corners, screw off the screw or wrench bad wrench. At this point, you can use the hammer gently shake the handle of the wrench, the general rust-proof screws can be twisted under the vibration. 2 knock: with the edge of the top hammer, knocking the corrosion of the nut, it is easy to loose nut. For example, the bike's feet at both ends of the fixed bolt nut, according to the foot pedal thickness, metal structure, grasp the size of the force hit the nut. Cast iron at the nut can be slightly larger force, plastic to gently beat. If you still can not, then use the hammer along the direction of the circle beat the nut, you can easily remove the nut.
Q:What does the screw m4x6 mean?
Diameter 4mm length 6mm (just the length of the thread)
Q:What is the meaning of the screw and the 4 and 8?
Strength grade 4.8, nominal tensile strength of 400MPA products, yield strength 320 (nominal 80%). For details, please refer to GB3098.1 or ISO898-1. There are all indicators
Q:No cross screwdriver, how can the screwdriver screwdriver?
Is the big nail? This is a lot of ways to find alternatives: glasses, calculators and other flat on the plane can be used to decorate the tip of the blade, be careful not to cut the hand do not cut the mirror material.
Q:How does the screw twist?
For the hexagonal head of the screw can be directly vibration (pay attention to strength), and then twist; if not edge of the case, you can use the saw or flat shovel of the head of the screw slotted with a screwdriver.
Q:Why should the screw twist clockwise?
Because the screw on the original flute is the clockwise direction of it
Q:How is the screw to use?
You say is a self-attack nail with a screwdriver twisted into the picture is not self-tapping is not used on the board, which is used on the expansion tube, to change the nail or wood screws, or direct use Nail nail
Q:What does the screw mean?
Screw is the use of objects of the circular circular rotation and friction of the physical and mathematical principles, step by step to fasten the tools of the tools. Screws are the general terms of fasteners, daily oral language

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