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Steel is a general term for iron-carbon alloys with a carbon content of 0.02% to 2.11% by mass. The chemical composition of steel can vary greatly. Steel containing a small amount of manganese, phosphorus, silicon, sulfur and other elements and a carbon content of less than 1.7% is called carbon steel; in actual production, steel often contains different alloying elements according to different uses, such as manganese, nickel, vanadium, etc. Humans have a long history of application and research on steel, but until the invention of the Bain steelmaking process in the 19th century, steel production was a high-cost and low-efficiency task.Today, steel has become one of the most used materials in the world with its low price and reliable performance. It is an indispensable component in the construction industry, manufacturing industry and people's daily life. It can be said that steel is the material basis of modern society.
Countersunk screws can also be called flat head screws, countersunk screws, semi-countersunk screws, and semi-countersunk screws. Generally, countersunk screws have cross grooves, which are the national standard specifications. The national standard number, that is, the national standard number is GB/T846-1985. Countersunk screws are generally used in power equipment, electronic machinery, mechanical equipment, household appliances, digital products, water conservancy projects, decoration and construction, etc. Countersunk screws are generally made of metal screw wires, which are formed and then rolled. They are cylindrical and have a flat head, such as an inclined surface around the side of the screw, so that the screw can lock the nut or other objects.
Countersunk Head Self Tapping Screw Drawing
S235JRof Chemical composition and mechanical properties
Specification
Product name
Countersunk head self tapping screws
Material
S235JR/A105GR B/DINST37-2/JISSS400/ASTMA
Size
M5
Length
25mm
Standard
JR/GR B/DIN/JIS/ASTM
MOQ
1 Piece
Connection Method
Threaded
Application
Industry
Packing
Standard Seaworthy Packing
Brand
NXF
Packing & Delivery
To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.
Company Profile
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories. Established in1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management and Craftsmanship."
1. who are we? We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office. 2. how can we guarantee quality? Always a pre-production sample before mass production; Always final Inspection before shipment; 3.what can you buy from us? Pipe,Flange,Steel plate,Pipe fittings,Alloy products 4. why should you buy from us not from other suppliers? Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment. 5. what services can we provide? Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA； Accepted Payment Currency:USD,EUR,CAD,HKD,CNY; Accepted Payment Type: T/T,L/C,D/P D/A; Language Spoken:English,Chinese
6. Are you trading company or manufacturer ? We are manufacturer. 7. How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity. 8. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight. 9. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Agent,Importer,Exporter,Seller
Year Established:
2000
Total Annual:
100000-10000000
Employee Number:
300~400
Ecer Certification：
Site Member
NXF GROUP have five branch factories in Shanghai★Zhejiang★Jiangsu★Hebei★Shanxi ,New Xifer (suzhou) Business Co., Ltd is one of the leading and most respected manufacturers in China. Our products include metals, machinery, containers, construction materials, mecanical products, electrical sys... NXF GROUP have five branch factories in Shanghai★Zhejiang★Jiangsu★Hebei★Shanxi ,New Xifer (suzhou) Business Co., Ltd is one of the leading and most respected manufacturers in China. Our products include metals, machinery, containers, construction materials, mecanical products, electrical sys...
