Bolts can be divided into hexagon bolts, carriage bolts, hexagon socket bolts, flange bolts, eye bolts, T-bolts, U-bolts, etc. Each bolt has different application scenarios, such as aerospace, photovoltaics, machinery, construction, etc. Bolts can also be divided into carbon steel bolts and stainless steel bolts. Carbon steel materials range from 4.8, 5.8, 6.8, 8.8.10.9 12.9 grades, stainless steel includes SS201, SS304, SS316, the main standards are DIN933, DIN931, DIN603, DIN912, DIN6923, DIN580, DIN444.
Nuts are parts that are screwed together with bolts or screws through inner threads to act as fasteners. Nuts can be divided into hexagonal nuts, flange nuts, cap nuts, square nuts, weld nuts, nylon locking nuts, etc. They are mainly used in construction, aerospace, mechanical equipment, and automobiles. Nuts can also be divided into carbon steel nuts and stainless steel nuts. materials range from 4.8, 5.8, 6.8, 8.8.10.9 12.9 grades. Stainless steel materials mainly include SS201, SS304 (A2), and SS316 (A4). The main standards are DIN934, DIN6923, DIN985, DIN557, DIN1587, DIN929, DIN6334, DIN582, and DIN936. We keep a large amount of M5-M20 DIN934 in stock all year round.
Washers are parts used for fasteners such as bolts, screws or nuts. They are usually located between the fastener and the nut to protect the surface of the workpiece, disperse the pressure and prevent the fastener from loosening.
Washers are divided into flat washers, spring washers, locking washers, stop washers, and special-purpose washers
Washers play an important role in mechanical connections. They protect the surface of the connected parts by providing additional contact area to avoid surface damage caused by direct contact with the nut or bolt head. At the same time, the use of washers can disperse the pressure of the fastener on the connected parts, thereby reducing the pressure per unit area and preventing soft materials from being crushed.
As a basic fastener, screws are widely used in daily life and various industrial fields. Their function is to connect two workpieces together and play a fastening role. There are many types of screws, including machine screws, self-tapping screws, woodworking screws, cement wall screws and self-drilling screws, etc. Each screw has its specific use and characteristics. In terms of material selection, screws are usually made of carbon steel or stainless steel to ensure their durability and corrosion resistance.
The type of screws and their characteristics are also important factors to consider when selecting and using screws. Machine screws are suitable for the connection of precision mechanical equipment, while self-tapping screws can be directly screwed into the material without pre-drilling, which improves construction efficiency. Woodworking screws are designed for wood materials and have a thread design that is easier to grip, while cement wall screws and self-drilling screws are suitable for the connection and fixation of harder materials such as cement walls and metal materials, respectively.
