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


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Q:How to remove when the screw is not threaded
You can use a chisel in the screw cap to open a word mouth, and then use the screwdriver can be screwed down.
Q:What is the invention of the screw?
Hello hello as early as 2000 years ago appeared, but it will be used for fixed objects to be delayed until about 500 years ago. The first person who describes the spiral is the famous ancient Greek scientist Archimedes, which uses a wooden bucket to make a spiral object used to extract water from one plane to another plane for irrigation. By the middle of the Middle Ages, craftsmen used wood nails or metal nails to connect the wood structure of the building. This should be the real predecessor of the screw. In the 16th century, people began to produce spiral nails. And to the 18th world, people began a large-scale production of fastening objects with a screw nail. The afternoon is helpful to you
Q:What are the technical requirements for fasteners?
1, the product used by the material (the available material is too much to see what your company to ask) 2, the accuracy of the thread (bolt type of external thread is generally 6g, nut class internal thread is generally 6h) 3, surface treatment Stainless steel materials generally do not do treatment, carbon steel, color, galvanized, Dacromet, nickel, chrome, etc.) 4, product tolerances before the surface treatment or surface treatment of the above is the standard parts of the standard, But also depends on the actual use, we must deal with the landlord.
Q:What material is used for spring washer
Usually with 65MN spring steel or 70# carbon steel, 3Cr13, also available in stainless steel material SUS304 or SUS316. 65Mn or some other low carbon steel, such as Q235, Q195, etc.
Q:Nominal diameter 12 washers, outside diameter?
due to the material and craft limits to threaded fasteners, bolts and other fasteners supporting surface is not big, therefore to reduce the pressure on the surface compressive stress protection by fitting of surface, it adopts the washer.In order to prevent the loose connection vice with locking spring washer and more tooth lock washer, round nut and lock washer with saddle, waveform, conical spring washer.
Q:How to remove the broken screw?
Thick (5 or more) easy to handle, playing a hole with a dedicated wire on the line. Fine can be trouble, it is better to just re-drilling tapping.
Q:Screws, bolts, screws, what is the difference between the three ah?
There are no hexagonal head but the middle of the screw with the middle of the pole known as the double-headed bolts (studs), the whole body is screw called screw, in addition to countersunk head neck bolts, T-slot bolts, anchor bolts, U-shaped bolts. Bolt tightening device for the torque wrench, the opening size of the various shapes of fixed wrench, the opening variable size of the movable wrench, hydraulic tight bolts need hydraulic pumps and other accessories. In short: fasteners with screwdrivers and hexagonal tools are screws, and fasteners with wrenches are bolts. Note: can not be distinguished by the size and length of the nominal diameter. For example, a M48 long 300mm cylindrical head fasteners, GB / 70.1-2008 standard will be defined as hexagonal head screws, not bolts.
Q:Do not use self tapping screws
Self tapping screws are needed to use the gasket.A part between a connector and a nut. A flat metal ring is generally used to protect the surface of the connecting piece from the nut.
Q:what are the Fasteners Selection Specification
Specification is: can not affect the performance of the product being used, and fully guarantee the effect of fastening.
Q:What are some of the common fastener products?
This fastener has two parts of the head and the nail, the two through-hole parts to connect the role of fastening, so that they become a whole. This connection is called rivet connection, sometimes called riveting directly. This connection can not be disassembled, because the two parts to separate, then we must put the parts on the rivets to destroy.

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