DIN603 Round Head Square Neck Bolt

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Product Description

Product Name	DIN603 Round Head Square Neck Bolt
Material	Carbon Steel, Stainless Steel 201/ 304/ 316 or others.
Size	M4--M22
Standard Model	DIN ANSI JIS ASTM
Min Order	1000piece/ pieces

Packaging & Shipping

Packing	Inner Box + Carton Box + Pallet or Under Your Requirement
Supply capacity	10000000 piece/ pieces per month
Delivery time	5~20 days after deposit
Export market	Asia, America, Europe, Africa, markets.

Our Services

1. Reliable Supplier
2. High Quality
3. Standard Producing Technology
4. Competitive Factory Price
5. Fast Delivery

1. Reliable Supplier

2. High Quality

3. Standard Producing Technology

4. Competitive Factory Price

5. Fast Delivery

Product Picture：

DIN603 Round Head Square Neck Bolt

Q: What are the advantages and disadvantages of car audio modification, wood washer and plastic washer?: Wood washer: divided into three plywood and MDF, they are afraid of water. In particular, the density board, see water expansion, brush waterproof, on the line. Advantages: can make the desired shape, there is no resonance.Plastic gasket defects: fixed shape, difficult to modify, there will be a little resonance, the advantages of super waterproof.If the horn is mounted directly on the plate, it is easy to cause resonance. This resonance will seriously deteriorate the quality. When the speaker vibrates, it will drive the steel plate to vibrate. Therefore, the main purpose of the installation of wood pad is to reduce the resonance, the installation of speakers more solid.

Q: Screws, bolts, screws, what is the difference between the three ah?: The screw is an incorrect call, non-professionals on the threaded parts collectively, in the industry without this call. In the fastener industry, in fact, screws and bolts are not a strict sense of the distinction. However, there are two ways in the industry to distinguish between screws and bolts: 1. According to the structure, the so-called twist structure, refers to the screw / bolt used to put the wrench above the place, that is, In some systems inside, the external pull the structure of the external screw rod-shaped parts are all called the bolt, on the contrary, will pull the structure called screw. This is a more obvious example is the Chinese national standard fasteners, for example, GB5782, GB5783 (a half thread, a full thread), the hexagonal bolts, The Because they are hexagonal structure, so, in the standard name, all called: bolts. 2, according to whether the product has a non-threaded bar features to distinguish. This is also a relatively wide use of a classification method, are generally so distinguish between bolts and screws. That is, if the part of the product other than the head is threaded, this part is called a screw. On the contrary, if, in addition to the thread but also has a light rod and other characteristics, called the bolt

Q: Screw M is mechanical teeth, tapping is what?: Screw M is the size of the screw, can not use the nominal judge whether the screw is a mechanical screw or self-tapping screws. Metric tapping screws are marked directly above the name Tapping Type.

Q: In the fastener industry, 1018 refers to what material: Low carbon steel, generally used for the production of self-tapping screws and screws and other low-strength fasteners products. 1018 steel chemical composition percentage: carbon C: 0.17-0.24; manganese Mn: 0.7-1.0; nickel Ni <= 0.25; phosphorus P: <= 0.035; sulfur S: <= 0.035; silicon Si: 0.17-0.37; <= 0.25; copper Cu: <= 0.25 domestic commonly used 18A and 22A material, carbon 0.18%. Domestic steel mills are now used daily SWRCH18A

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: For example, some people ask us to assemble the time zone of the flat washers of the positive and negative side, I would like to ask the installation of flat washers have positive and negative points? If yes, how to distinguish?: From the use, do not distinguish between positive and negative. From the beautiful, bright flat surface, outward

Q: Are there categories of fasteners classified by material?: Mainly carbon steel, alloy steel, stainless steel, other materials category

Q: Our company to purchase a number of fasteners to see when the CAD drawings in the technical requirements I do not know the specific to write those content: You mark the standard number and grade on the line, but the general standard is not required to issue a drawing. Quality inspection in accordance with the standard check can be.

Q: Engineering argument, usually referred to as the M3 screw, M refers to what is the meaning? The Please instruct the engineering staff.: M: ordinary thread;: screw that thread diameter (ie, the top of the thread) is 3mm, nuts that thread diameter

Q: How to remove the broken screw?: The other are open to grow a little, grinding flat to seize the rotation, or the middle cut a knife with a zigzag tool to turn, the bigger the better to take the iron put on the surface of the welding, or with a word tool alignment loose Open the direction of the angle to play a few turn a few times, did not save the drill through the hole directly through the big mouth to re-open teeth on the line.

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