High-Quality M12 & M20 Brass-Plated Flat & CSK Head Machine Screw
T1 T2 T3
Product Description:
A machine screw is a fastener that is used like any other fastener
to join two or more objects. However, machine screws are unique
because of their size. The American Society of Mechanical Engineers
(ASME) defines machine screws as having a diameter of no more than
0.75 inches. They can be less than 0.75 inches in diameter, but no
larger. As a result, machine screws are generally smaller than most
other types of screws.
In addition to being 0.75 inches or less in diameter, machine
screws also feature a uniform thread. What exactly does this mean?
Well, screws typically have uniform or tapered threads. Uniform
threads mean that the external threads (the spiral ridges on the
outside of the screw) remain the same size from the top to the
bottom of the screw. In contrast, tapered threads mean that the
threads of the screw expand in taper or towards the bottom. Machine
screws have a uniform thread that remains the same size from top to
bottom.
Advantages of Machine Screws
Machine screws are often preferred over other, larger screws. Due
to their small size, they offer a wider range of applications.
Machine screws can be used to attach countless types of products,
objects, and surfaces.
Machine screws are also available in different materials. Stainless
steel is a common material used to manufacture machine screws. It
is strong and durable and provides a high level of protection
against rust and corrosion. Aluminium is another common material
used to manufacture machine screws. Like stainless steel, it offers
protection against rust and corrosion. Aluminium machine screws are
not as strong as stainless steel screws, but they are also not as
heavy. For applications where weight is a concern, aluminium
machine screws may be preferred!
Applications
Brass products oxidise easily and are not well maintained. The
following small ways to maintain copper products:
1, preserved in the air dry place, not contact with acidic
substances, available soft flannel and professional decontamination
agent wiping
2, brass material to keep the surface of metal products clean and
dry can prevent rusting
3,Covering the surface of brass products with a protective layer
can also prevent rusting.
4, the surface with electroplating, hot plating and other methods
of plating a layer of metal that is not easy to rust, such as zinc,
tin, chromium, nickel, etc.
5, can be used in brass products components and materials on the
surface of the copper anti-colouring agent, this anti-colouring
agent anti-corrosion effect is good, no loss of workpiece, easy to
use, does not burn, does not contain sodium nitrite and other toxic
substances, safer and more environmentally friendly.
Because of its good workability, heat treatability and mechanical
properties, brass is widely used in the manufacture of mechanical
parts such as bearings, gears, nuts, bolts, washers, springs,
valves, pump bodies and automotive parts. In addition, brass can be
used to manufacture a variety of connecting fittings and valves,
such as pipes, water meters and faucets for domestic plumbing
equipment. In addition, brass has a wide range of applications in
the field of construction and decoration. It can be used to make
indoor and outdoor decorative materials, such as doors, windows,
railings, stair handrails, lamps, bronzes, sculptures and so on.
Due to its good corrosion resistance and antibacterial properties,
brass products are often used in the decoration and fabrication of
bathrooms, kitchens and medical equipment. In addition, due to its
good plasticity and weldability, brass can also be used to make
sculpture work.
Stainless steel is a high-quality alloy steel, with corrosion
resistance, high temperature resistance, beautiful and generous,
low density, high strength advantages, so in all walks of life in a
wide range of applications. Stainless steel maintenance and
maintenance is to ensure its long-term normal use of an important
part of the following stainless steel maintenance of the specific
methods as well as processes.
Stainless steel maintenance methods
1, the use of physical ways to maintain:Stainless steel surface has
a layer of natural film, can protect the stainless steel from
corrosion in the air, therefore, to maintain the stainless steel,
we should try to protect this film. In the process of use, should
avoid impact scratch or collision surface, if there is a stain, you
can use a soft cloth or rag to scrub, do not use sandpaper and
other abrasive materials to clean.
2, the use of chemical maintenance:When the stainless steel is in a
humid environment for a long time, it may be corroded, therefore,
to protect the stainless steel, it is necessary to take the
chemical way to maintain. You can use acid, alkali and other
cleaning agents, gently wipe the surface of stainless steel, you
can also use anti-corrosive agents and other special properties of
the liquid, should be rinsed with water immediately after use, and
then wipe the surface with a clean cloth, in order to protect the
surface finish and corrosion resistance of stainless steel.
| No. | C% | Cr% | Ni % | Mo % |
| 304 | 0.07 | 17.5-19.5 | 8.0-10.5 | / |
| 316 | 0.08 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 |
| 301 | 0.15 | 16.0-18.1 | 6-8 | / |
| 310 | 0.08 | 24-26 | 19-22 | / |
| 304L | 0.03 | 18-20 | 8-12 | / |
| 316L | 0.03 | 16-18 | 10-14 | 2-3 |
| 321 | 0.08 | 17-19 | 9-12 | / |
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