Shenzhen Chuanggu Hardware Co., Ltd. specializes in manufacturing GB/T818-2000 cross recessed pan head screw 818-85, made of stainless steel 304 and carbon steel. Complete range, stock in stock, electroplating different colors, low-cost manufacturers wholesale.
HFCs (hydrofluorocarbons) are the third
generation of fluorine-based gases.
Zhejiang Zhonglan Refrigerants Co.,Ltd
offers a number of lower GWP HFC solutions, such as R134a, R404a, R406a, R407c,
R410a, R507,R417a,R422d,R125,R32, etc. For new equipment purchases, we also
supply a wide range of HFC alternatives. These include HC(natural
refrigerants), which provide a viable, lower GWP alternative to HFCs.
The Phillips pan head screw is a commonly used screw in our screw industry. Our screw industry habitually called the yuan machine. Or round head screws, round head screws. Or called a semi-circular head screw. Of course, there are more names. But all have the same meaning. They are all the same product. The countries are labeled GB/T818-2000 and 818-85. 
The Phillips pan head screws are made of iron and stainless steel "target=_blank> stainless steel. The iron is generally made of 1010A wire. If it needs to be hardened, or 8.8, we It is generally produced with screw wires 1008 and 10B21. Stainless steel "target=_blank> stainless steel has stainless steel" target=_blank>stainless steel 201 and stainless steel "target=_blank>stainless steel 304 and stainless steel" target=_blank>stainless steel 316.
If the cross recessed pan head screw is iron, it generally needs to be electroplated, and the plating is environmentally friendly and non-environmental. It is ordinary plating. Environmentally friendly, environmentally friendly white nickel, environmentally friendly color zinc, environmentally friendly white zinc, environmentally friendly black zinc and so on. Ordinary removal of the word green can be done. 
This article sourced from Shenzhen Chuanggu screw network: http://
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
These products are categorised as having zero ODP (Ozone Depleting Potential)
and medium to high GWP (Global Warming Potential) and so offer a more
environmentally friendly alternative to CFCs and HCFCs.
HFCs are used in a wide range of refrigeration and air conditioning equipment
specifically designed for them, and as "drop
in" retrofit gases for older CFC or HCFC equipment. HFCs are also
used in selective propellant and foam blowing
applications.
A growing focus on the environmental
impact of refrigerants is fuelling demand for refrigeration solutions
that can provide satisfactory cooling performance with a lower impact on global
warming. This is propelling environmentally friendly refrigeration solutions to
the top of the corporate sustainability agenda. In addition, local legislation
is increasingly targeting refrigerant gases with high GWP.
HFC Refrigerant Blends,Freon Refrigeration,Blend Refrigerant Gas,Mixed Refrigerant Gas
ZHEJIANG ZHONGLAN REFRIGERATION TECHNOLOGY CO.,LTD , https://www.uiszl.com