Custom DIN933 Hex Head Screw
Currently, there are two main length measuring systems around the world: metric system and British system. The former is used in Europe, China, Japan and Southeast Asia, with units of measurement like meter (m), centimeter (cm) and millimeter (mm), the latter is used in the USA, UK and European countries, with units of measurement like inch, which is equivalent to Cun in traditional Chinese measurement system.
Hex head screws are made of carton steel of grade 4.8 or grade 8.8, 10.9 or 12.9 with high strength, and of stainless steel of grade 304 or 3161.
The 4.8 grade hex head screws are mostly seen on the market. A, B and C are used to specify the precision grades. Hex head screws of grade A and B are very important and used a lot, with high assembly accuracy requirements, usually in occasions subjected to large impacts, vibrations or alternating loads. Hex head screws of grade C are mostly used in occasions with rough surfaces and low assembly accuracy requirements.
As the most common one out of the stainless steel fastener family, the stainless steel hex head bolts are usually used with nuts in places with high anti-corrosion or high surface smoothness requirements for the products. The performance grades of stainless steel hex head bolts are A2-70, A4-70 and A4-80 of austenitic steel. Normally, they are made of stainless steel SUS304 or SUS316 by heading.
The hex head bolts are made of stainless steel by heading of wire rods which have two types: stainless steel 304 and stainless steel 316. Its price depends on the stainless steeled used. Better stainless steel has a higher price. The performance grades of stainless steel hex head bolts are A2-70, A4-70 and A4-80 of austenitic steel. Normally, they are made of stainless steel SUS304 or SUS316 by heading.
①If the content of chromium is lower than 17%, the minimum content of nickle should be 12%.
②For the austenitic stainless steel with maximum carbon content of 0.03%, its content of nitrogen can be up to 0.22%.
③For a product with a large diameter, to achieve specified mechanical properties, a higher content of carbon can be seen on the manufacturer’s instructions, but the content of carbon cannot be over 0.12% for austenitic steel.
Stainless steel usually refers to the steel with resistance against corrosion from air, water, acid, alkali, salt or other media. By alloy composition, it is divided into stainless steel and acid-proof steel. The steel used to manufacture hex head bolts is mainly austenitic stainless steel. The steel that we refer to in daily life is also austenitic stainless steel.
Dimensions of the DIN933 Hex Head Bolt:
Purpose of the DIN933 hex head screw:
As a common bolt, the hex head screw is used to connect two parts or components with through holes, together with a nut, The hex head screws of grade A and B are very important and used a lot, with high assembly accuracy requirements, usually in occasions subjected to large impacts, vibrations or alternating loads. Hex head screws of grade C are mostly used in occasions with rough surfaces and low assembly accuracy requirements
DIN933 Stainless Steel Hex Cap Screws&Bolts Hex NutsAdvantages:
Stainless steel 304 316 for non-standard and customized products. The gap between the nut and the screw is small, and the precision requirements are up to international standards. If required, the material certificate can be provided for customers.
Nut testing method: After the nut is tightened with the screw, shake the nut from side to side to feel the gap between them. If the gap is large, it is considered defective. The smaller the gap, the better, so as to check the rib precision of the screw.
Stainless steel bolts are mainly used in environmental protection equipment, medical equipment, communication equipment, electric power facilities, electronic products, instruments and meters, food machinery, petrochemical industry, ship assembly, pump valve pipelines, curtain walls of buildings, outdoor occasions, sports facilities, outdoor decoration, etc.
The threads on a hex head screw are usually fine-tooth regular threads. The hex head screws with regular threads of circling teeth have good self marketing and are mainly used in occasions subjected to large impacts, vibrations or alternating loads. Normally, a hex head screw has partial threads. Hex head screws with complete threads are mainly used for external hexagons with shorter nominal lengths and the occasions with longer thread requirements. Hex head screws with holes are used for the occasions where the hex head screws need to be locked. Hex head screws with reamed holes can be used to fix connected parts to corresponding positions in a precise way and endure shearing and squeezing caused by transverse forces, so they are applicable to industries such as bridge construction, mechanical equipment, communication and medical equipment. Yijin Hardware manufactures a large amount of standard and custom hex head screws every year, with an annual output of 10,000 tons. With good quality and reasonable prices, Yijin Hardware’s custom hex head screws are favored by customers all over the world!
|Drawing format||.jpg/.pdf/.dxf/.dwg/.igs./.stp/x_t. etc|
|– self-inspection by technicians during production|
|Quality assurance||– Spot inspection by engineers during production|
|– QC inspection after products are finished|
|Shipment||By express and by sea, per customers’ requirements|
|Lead time||10~15 working days|
1. How can I get a quote?
Please email us and provide a 2D or 3D drawing, with quantity, material, and surface treatment, and the quote will be sent within 24 hours.
2. Do you provide samples?
Yes, we provide 1~100 pieces, and a trial order before mass production is welcomed.
3.Are you a trading company or manufacturer?
We are a specialized manufacturer.
4.Do you support OEM custom services?
Yes, of course. we provide custom services for you based on your drawing.
5.What is your terms of payment?
For a payment<5,000 USD, 100% in advance.
For a payment>=5,000 USD, 30% in advance.
6.What is your after-sales service?
Things can sometimes go wrong in any machining shop. If your part isn’t up to specifications, please send it back to us and we will fix or remake it for you free of charge.
Yijin Hardware has been providing custom CNC machining services and fasteners including screws, nuts and bolts for 20 years. With its capabilities of manufacturing fasteners including screws, nuts and bolts, Yijin Hardware holds an irreplaceable position in China. We are confident that we can manufacture fasteners with much higher quality than others, including screws, nuts and bolts.