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Kunshan Grace Hardware Co., Ltd.
About us
Your Professional & Reliable Partner.
We have Magnetic Powder Detector, Material Testing Machine, Metallographic Microscope, such testing instruments, guarantee product high quality and beautiful appearance.The quality control is strictly performed from buying raw materials in warehouse to different machining procession and to final packing.First, we have our own High-precision Digital Machining center for mould making in special Mould Workshop, excellent mould make product beautiful appearance and its size accurately.The second, we ...
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Year Established

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Million+
Employees

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Million+
Customers Served

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Million+
Annual Sales
China Kunshan Grace  Hardware Co., Ltd. HIGH QUALITY
Trust Seal, Credit Check, RoSH and Supplier Capability Assessment. company has strictly quality control system and professional test lab.
China Kunshan Grace  Hardware Co., Ltd. DEVELOPMENT
Internal professional design team and advanced machinery workshop. We can cooperate to develop the products you need.
China Kunshan Grace  Hardware Co., Ltd. MANUFACTURING
Advanced automatic machines, strictly process control system. We can manufacture all the Electrical terminals beyond your demand.
China Kunshan Grace  Hardware Co., Ltd. 100% SERVICE
Bulk and customized small packaging, FOB, CIF, DDU and DDP. Let us help you find the best solution for all your concerns.

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Fasteners are applied and tested
Fasteners are a class of mechanical parts used for fastening connections and used in a wide range of applications. Fasteners, the use of a wide range of industries, including energy, electronics, electrical, mechanical, chemical, metallurgical, mold, hydraulic and other industries, in a variety of machinery, equipment, vehicles, ships, railroads, bridges, buildings, structures, tools, instruments, chemicals, instruments and supplies, etc., can see a wide variety of fasteners, is a more widely used mechanical foundation parts. It is characterized by a wide variety of specifications, different performance uses, and standardization, serialization, generalization of the degree is also extremely high. Therefore, some people also have a national standard for a class of fasteners called standard fasteners, or simply referred to as standard parts. Application of fasteners In a variety of machinery, equipment, vehicles, ships, railroads, bridges, buildings, structures, tools, instruments, meters and supplies, etc., can see a variety of fasteners. It is characterized by a wide variety of specifications, different performance uses, and standardization, serialization, generalization of the species degree is also extremely high. Therefore, some people also have a national standard for a class of fasteners called standard fasteners, or simply referred to as standard parts. Fasteners are widely used in the mechanical foundation parts. With China's accession to the WTO in 2001 and step into the ranks of international trade powers. China's fastener products are exported to a large number of countries around the world, and fastener products from all over the world continue to pour into the Chinese market. Fasteners as one of the products with large import and export volume in China, to achieve international convergence, to promote Chinese fastener enterprises to the world, to promote fastener enterprises to fully participate in international cooperation and competition, are with important practical and strategic significance. As each specific fastener product specifications, dimensions, tolerances, weight, performance, surface conditions, marking methods, as well as acceptance inspection, signs and packaging and other items of specific requirements. Commonly used testing instruments The most important aspect of the development and design of fasteners is quality control, and there are several major gates from incoming materials to finished product shipment, which have different inspection methods. First of all, the incoming material is related to the appearance, size, elements, performance, harmful substances testing, etc.; the process is more appearance, size, knocking experiments, forging flow lines; heat treatment is more appearance, hardness, torque, tension, gold and so on; surface treatment is more some hydrogen embrittlement test, plating, salt spray, etc., including the shipment of a harmful substances testing. In the size, appearance testing, common is the secondary yuan, contour measuring machine, coordinate measuring machine, image sorting machine (this is a full selection machine); mechanical and chemical testing, mainly hardness machine (Rockwell and Vickers), tensile strength machine, metallographic microscope; materials testing, there is a spectral analyzer, salt spray tester.

2023

01/09

Specifications and Types of Screws
Screw, also called "screw" [Screw] (screw nail), "screw" (screw rod). In fact, screw is the common name, and screw, screw rod are different from each other. Screw is generally called wood screws; is the front end of a pointed kind, the pitch is larger, generally used to fasten wooden parts, plastic parts. Screw rod is machine screws (mechanical screws), is the front end of the kind of flat head, pitch is small, uniform, generally used to fasten metal, machine parts. Common specifications A: Metric screws B: American screws C: Inch screws A: Metric machine screws: Metric Ex: M3 x 6 - P P B : M3 machine screw, 6mm long, Phillips, round flat head, black plated. Finish Code: Appearance specification Head Code: Head profile. Screw head profile. Cylindrical head. Semi-countersunk head. Countersunk head. Spherical cylindrical head. Pan head. Semi-round head. Hexagonal head. Common types of screws A: Machine Screw B: Tapping Screw B-1: Sheet Metal Tapping Screw B-2: Plastic Tapping Screw C: Wooden Screw D: Drywall Screw E: Self Drilling Screws F: Expansion Screws, Four Piece Expansion Screws aka: Four Piece Gecko. The grade of expansion screws are divided into: 45, 50, 60, 70, 80, the material of expansion screws: mainly divided into austenitic A1, A2, A4 1 stainless steel plate, metal steel plate, galvanized steel plate, engineering installation. 2 metal curtain wall metal light compartment and other indoor and outdoor installation. 3 general angle steel, channel steel, iron plate and other metal materials combined with the installation. 4 car trunk, container box, shipbuilding industry, refrigeration, screw machine equipment and other assembly projects.

2023

01/09