Definition and purpose of bolts
Studs are high-strength and rigid fasteners used in various steel structure projects for rigid combination connections between different connectors. It uses arc stud welding to fix the cylindrical head welding nail on the connecting piece, which enhances the structural stability and load-bearing capacity.
Specification of bolts
The specifications of bolts are usually nominal diameters of 10mm to 25mm, and the total length before welding is 40mm to 300mm. This specification of bolt is suitable for connection requirements in various steel structure engineering.
Chemical composition and mechanical properties of bolts
Studs are usually made of low-carbon alloy steel, with chemical compositions including carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), etc. In terms of mechanical properties, the tensile strength of the bolt should not be less than 400N/mm ², the yield point should not be less than 320N/mm ², and the elongation rate should not be less than 14%.
Size and surface requirements for bolts
The size of bolts has specific regulations, such as minimum length, maximum length, diameter, etc. In addition, the surface of the bolt should be free of rust, oxide scale, grease, burrs, etc. The rod should not have cracks that affect its use, and the depth of the head cracks should not exceed a certain value.
National standard for bolts
The national standard for bolts is issued by the General Administration of Quality Supervision, Inspection and Quarantine of China, with the specific standard being GB/T10433-2002. This standard is applicable to shear resistant components, embedded components, and anchoring components of various structures in civil and construction engineering, and ensures the quality and safety of bolts.
Stud is a type of fastener used for high-strength and rigid connections in steel structure engineering, mainly applied in various steel structure constructions, serving as a rigid combination connection. The specification of the bolt is usually a nominal diameter of 10-25mm and a total length of 40-300mm before welding. It is the abbreviation of cylindrical head welding nail for arc stud welding, which is firmly embedded in concrete through welding technology and tightly connected to steel structure, thereby improving the bonding strength between the two materials, enabling more effective load transmission between steel and concrete, and enhancing the bearing capacity of the entire structure. The application of bolts is widespread, especially in large-scale projects such as high-rise buildings, bridges, and industrial plants, and is a key factor in ensuring structural stability. In addition, bolts can also improve the shear resistance of structures, especially under horizontal forces (such as wind loads and seismic actions), by resisting relative slip caused by shear forces, ensuring that the structure can maintain integrity under horizontal forces, and enhancing the seismic and wind pressure resistance of the structure.
A hinge is a mechanical device used to connect two solids and allow for relative rotation between them. It is usually composed of movable components or foldable materials. The main function of the hinge is to assist in the opening and closing of the cabinet, by connecting the rotating pair, so that the door or cover can swing on the fixed frame. According to different installation positions, hinges can be divided into door hinges and cabinet hinges. Door hinges are used to allow doors to rotate naturally and smoothly to open and close, while cabinet hinges have more functions and designs, such as rotating 360 degrees, adjusting the gap between doors up, down, and left and right.
Metal Stamping parts products Can be made into different size according to customer’s requirements. Material: carbon steel, stainless steel,aluminum,copper,etc. Finish: white zinc plated, blue zinc plated, etc.
12.9 Grade Steel Zinc Plating DIN 912 Hex Socket Head Cap Screws Diameter : M3- M16 Material : Carbon steel Finish : Blue/yellow zinc plated Length : 6 – 100mm OEM : Offer Prices vary in different sizes, please contact us before order!
Standard GB, DIN, ISO, JIS Size As request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Standard GB, DIN, ISO, JIS Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Finish ZINC PLATED Measurement system Metric Application Heavy Industry, Retail Industry, General Industry Place of Origin China Hebei Standard DIN ASTM BSW GB Product name Rivet Nut Material Carbon Steel , Stainless Steel manner of packing Carton or according to customer requirements port of shipment Tianjin Port
Standard GB, DIN, ISO, JIS Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Product name Butterfly nut texture of material SS304 SS316 stainless steel，mild steel, Carbon steel,1018,1022,10B21,SCM435,12L14, 1215,4140, 4340, 5120,5140,5145, etc. standard ASME ISO DIN BS Grade A2 A4 or grade 2 5 8 10 Surface plain, zinc plated, hot dip galvanized ,black oxide packing Plastic bag / carton
Product Name Stainless Steel Threaded Rivet Nuts m10 m12 SS304 White Yellow Zinc Flat Head Sleeve Barrel Round Insert Nuts With Knurled Body Size M3-M12 Material Carbon Steel,Stainless Steel,Aluminum Surface Treatment Plain, black, zinc plated/according to your requirement Standard DIN GB ISO JIS BA ANSI Grade SUS201, SUS304, SUS316, A2-70, A2-80, A4-80, 4.8 6.8 8.8 10.9 12.9 Quality Policy All the parts manufactured 100% inspection from OQC before shipping. Thread Coarse, fine Used Building industry machinery,etc Non-standards OEM is available, according to drawing or samples
Metal Stamping parts products Can be made into different size according to customer’s requirements. Material: carbon steel, stainless steel,aluminum,copper,etc. Finish: white zinc plated, blue zinc plated, etc.
Product Name Stainless Steel T-Bolt/T head bolt Size m10x75 m6 m12 m8 m9 m12 m20 m29 Grade 4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9,etc Available Material 304 stainless steel,plastic,brass,carbon steel,titanium,aluminum,etc Surface treatment Zinc plated,Black oxide,Phosphate,Dacroment,etc Standard ISO,BS,ANSI, GB,DIN,JIS,Nonstandard Advantage OEM / ODM / customized service provided Quality control ISO standard,100% Whole range inspection through the production Certificate ISO9001,ISO14001,IATF16949,ROHS,etc
Standard GB, DIN, ISO, JIS Size M3-M50 or non-standard as request&design Material Carbon steel, stainless steel, alloys steel etc. Hex head bolt and nut Grade 4.8 / 6.8 / 8.8 / 10.9 / 12.9 , A2-70 / A4-80 Packing Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Hexagonal Self-drilling screw Diameter: 4.8mm, 5.5mm,6.3mm(10#,12#,14#), etc. Length: 16-300mm Material: carbon steel, stainless steel, etc. Finish: white zinc plated, yellow zinc plated, blue zinc plated, etc.
Metal Stamping parts products Can be made into different size according to customer’s requirements. Material: carbon steel, stainless steel,aluminum,copper,etc. Finish: white zinc plated, blue zinc plated, etc.
