DIN558 Hexagon Head bolts- Full Thread

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Product Description

Product Name	DIN558 Hexagon Head bolts- Full Thread
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：

DIN558 Hexagon Head bolts- Full Thread

Q: Why the screw thread more closely, spin into the more effort?: Because the length of the screw into a certain, do a certain job. The more tight the thread, the equivalent of the longer the distance rotation, power = distance × force, long distance, the need for force naturally small

Q: Why do you have to add a spring washer when it comes to the role of ah ah ah: If the screw on a spring washer, screw and screw hole fixed, due to the role of the spring washer spring will greatly reduce the possibility of loosening screws, falling off

Q: Specific conditions for use of spring washers: The inner tooth elastic washer and the outer tooth elastic washer circle are provided with a plurality of sharp elastic teeth which are pressed on the supporting surface, which can prevent the loosening of the fastener. The inner tooth elastic washer is used for the screw head with smaller head size. The elastic washer with teeth is smaller than the ordinary spring washer, and the fastener is even and reliable to prevent the looseness. Wave spring washers GB: GB/T 7246-1987 wave washers are divided into WG, WL type and WN type WG type WG type wave washer: wave washers for open type elastic washer, it usually can be installed in a small space, such as to reduce bearing prestress bearing running noise, improve the operation accuracy and stability of bearing there are also applications.

Q: M4.8 * 25 What does it mean in screw size?: No meaning that there is no one of the most close to the national standard is, M5 * 25 For example, GB70.1, M5 × 25 hexagon socket head cap screws

Q: Fasteners often say that the nature of galvanized oxidation is what it means: Fasteners, is a fastening connection with the application of a very wide range of mechanical parts. Fasting, widely used in industries such as energy, electronics, electrical appliances, machinery, chemical, metallurgy, mold, hydraulic, etc., in various machinery, equipment, vehicles, ships, railways, bridges, construction, structure, tools , Chemical, instrumentation and supplies, etc., can see a wide range of fasteners, is the most widely used mechanical base pieces. It is characterized by a wide variety of specifications, performance purposes vary, and standardization, serialization, the degree of generalization is also very high. Therefore, some people have a national standard of a class of fasteners called standard fasteners, or simply referred to as standard parts.

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: The main meaning is that the design to make some specific requirements to achieve consistency.: Easy to install, disassemble; to ensure long-term solid does not fail (life); do not exceed the standard selection, cost savings;

Q: Is it hard to heat the fasteners?: Heat treatment mainly refers to the dipped fire. Dip the fire is not dipped into the water, is the oil. So the quality of oil, dipped in the temperature of the fire, dipped in the fire time are demanding Moreover, some special requirements need to double the fire, the difficulty is indeed great. In addition, heat treatment often take into account the requirements of the next step surface treatment, so have to consider

Q: Fasteners are used in what areas?: facilities, tools and instruments of human production will not be produced, people will no longer have electricity, no more tap water, no longer have a variety of automation equipment, no longer There is a lot of construction projects will not be able to solve the problem of connecting technology and a comprehensive shutdown, the level of human society productivity at least 300 years back, our lives will become incredible.

Q: In the design, the bolt connection is necessary to have a gasket?: The bolt must not install gasket, join many planes and automobiles and ships, wind turbines, atomic energy equipment is not installed gasket, everywhere is whether heavy vehicles or small bolts on the wheel without gasket. Gasket is the name of the washer, flat washers, special washers, spring washers, washers, washers. Installed not installed gasket, what gasket, depending on the specific design requirements, to have the basis of choice. In general, the position of the bolt hole is very high, the bolt hole diameter is relatively small, with close to that level of reaming hole, install flat washer is unnecessary, it does not have the nut friction. For those with very rough hole bolt connection, such as with M12 bolt hole diameter of 16mm, 18mm, it should be installed flat washer. This connection is often a lap of the steel frame, the location of poor manual drilling equipment. The automobile gear box is usually a hole on the production line and the position of the hole is high, and the bolt hole with the gap is relatively small, do not install the washer, otherwise the smaller contact area of the nut, the bolt is easy to loose.

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