Service HotlineIn the switchgear of high and low voltage power equipment, the surface of many switchgear shells is painted or sprayed with plastic, and the installation beams and other parts of the switchgear and the entire cabinet must be continuously grounded according to the requirements of switchgear standards to improve the safe use of equipment. Because the common screw, spring washer, flat washer and nut type structural connection between the surface of the shell and the metal mounting beam cannot meet the requirements of grounding continuity, in order to meet the requirements, the surface of the shell is painted or Before spraying, special grounding studs must be welded. With the increase of installation beams, the number of welded studs must also increase, which increases the complexity of the product processing technology, wastes man-hours and increases costs.
The machinery industry is one of the main users of fasteners. Due to China's late understanding of the important position of mechanical basic parts in the machinery industry and a long-term lack of investment, the entire industry has a poor foundation, weak foundation and weak strength. Especially with the improvement of the level of the main engine in China, the bottleneck phenomenon that the mechanical basic parts lag behind the main engine has become increasingly apparent. Today, although the state has given certain support in technology introduction, technological transformation, scientific research and development, etc., there is still a big gap compared with the current market demand and foreign levels. Unstable quality, high early failure rate and poor reliability. Fasteners are the main basic products in the machinery industry, and the development of the machinery industry also puts forward higher requirements for fastener products. Domestic ordinary standard fasteners have always been in oversupply, while high-end fasteners (high temperature, special-shaped, titanium-plastic composite, special performance and other fasteners) are in short supply, and they also rely on imports. The State Machinery Bureau lists ordinary standard fasteners as restricted development products, and high-strength special-shaped fasteners as currently encouraged development products. With the improvement of the country's industrialization level and technological progress, the use of high-strength fasteners has gradually increased.
GB/T3103.3-2000 Fastener Tolerance Flat Washers 2 GB/T5286-2001 General Scheme of Flat Washers for Bolts, Screws and Nuts 3 GB/T9074.1-2002 Bolts or Screws and Flat Washers Assemblies 4 GB/T9074. 18-2002 Self-tapping screws and flat washers assemblies 5 GB/T 95-2002 Flat washers C grade 6 GB/T96.1-2002 Large washers A grade 7 GB/T96.2-2002 Large washers C grade 8 GB/T97. 1-2002 Flat washer Class A 9 GB/T97.2-2002 Flat washer chamfered Class A 10 GB/T97.4-2002 Flat washer for screw and washer assemblies 11 GB/T97.5-2002 Flat washer Self-tapping screws and washers assemblies 12 GB/T848-2002 Small washers Class A 13 GB/T5287-2002 Extra large washers Class C 14 GB/T4678.13-2003 Die-casting mold parts Part 13: Push plate washers 15 GB/T4605 -2003 Rolling bearing thrust needle roller and cage assemblies and thrust washers 16 GB/T97.3-2000 Flat washers for pins 17 GB/T18230.5-2000 Flat washers for bolted structures quenched and tempered 18 GB/T9074.5 -2004 Cross recessed small pan head screw and flat washer assembly 19 GB/T9074.20-2004 Cross recessed hexagon head tapping screw and flat washer assembly 20 GB/T3762-1983 Sharp angle sealing washer for ferrule type pipe joint 21 GB/T1231-2006 Specifications for high-strength large hexagon head bolts, large hexagon nuts and washers for steel structures 24 GB/T5649-2008 Lock nuts and washers for pipe joints and washers 27 GB/T10447-2008 Elements and tolerances of semicircular thrust washers for sliding bearings 28 GB/T94.1-2008 Specifications for elastic washers Spring washers 29 GB/T10446-2008 Dimensions and tolerances for full circle thrust washers for sliding bearings 30 GB/ T93-1987 standard spring washer 31 GB/T94.2-1987 elastic washer technical conditions toothed, serrated lock washer 32 GB/T98-1988 stop washer technical conditions 33 GB/T849-1988 spherical washer 34 GB/T850- 1988 Conical Washer 35 GB/T851-1988 Split Washer 36 GB/T852 -1988 Square bevel washer for I-beam 37 GB/T853-1988 Square bevel washer for channel steel 38 GB/T854-1988 Single-ear stop washer 39 GB/T7244-1987 Heavy-duty spring washer 40 GB/T855-1988 Double-ear stop Dynamic washer 41 GB/T7245-1987 Saddle spring washer 42 GB/T7246-1987 Wave spring washer 43 GB/T856-1988 Outer tongue stop washer 44 GB/T858-1988 Stop washer for round nut 45 GB/T859-1987 Light spring washer 46 GB/T860-1987 Saddle elastic washer 47 GB/T861.1-1987 Internal tooth lock washer 48 GB/T861.2-1987 Internal serrated lock washer 49 GB/T862.1-1987 External tooth lock 50 GB/T862.2-1987 External Serrated Lock Washers 51 GB/T955-1987 Wave Elastic Washers 52 GB/T27938-2011 Sliding Bearing Thrust Washers Failure Damage Terms, Appearance Features and Reasons 53 GB/T956.1- 1987 Conical lock washer 54 GB/T956.2-1987 Conical serrated lock washer 55 GB/T28697-2012 Rolling bearing self-aligning thrust ball bearing and self-aligning seat washer Dimensions 56 GB/T9074.2-1988 Cross groove disc Head screw and male serrated lock washer assembly 57 GB/T9074.3-1988 Cross recessed pan head screw and spring washer assembly 58 GB/T9074.4-1988 Cross recessed pan head screw, spring washer and flat washer assembly 59 GB /T9074.7-1988 Cross recessed small pan head screw and spring washer assembly 60 GB/T9074.8-1988 Cross recessed small pan head screw and spring washer and flat washer assembly 61 GB/T9074.9-1988 Cross recessed countersunk Head screw and conical lock washer assembly 62 GB/T9074.10-1988 Cross recessed countersunk head screw and conical lock washer assembly 63 GB/T9074.11-1988 Cross recessed hexagon head bolt and flat washer assembly Parts 64 GB/T9074.12-1988 Cross recessed hexagon head bolt and spring washer assembly 65 GB/T9074.13-1988 Cross recessed hexagon head bolt, spring washer and flat washer assembly 66 GB/T9074.15- 1988 Hexagon head bolt and spring washer assembly 67 GB/T9074.16-1988 Hexagon head bolt and serrated lock washer assembly 68 GB/T9074.17-1988 Hexagon head bolt, spring washer and flat washer assembly 69 GB/T9074 .26-1988 Spring Washers for Assemblies 70 GB/T9074.27-1988 External Serrated Lock Washers for Assemblies 71 GB/T9074.28-1988 Conical Lock Washers for Assemblies 72 GB/T1030-1988 Inner Spherical Washers[1]
Spring washers are often called spring washers in the screw industry. Its materials are stainless steel and carbon steel, and carbon steel is also iron. The commonly used spring washers are M3, M4, M5, M6, M8, M10, M12, M14, M16. These specifications are more commonly used. The national standard for spring washers is GB/T 94.1-87, which specifies standard spring washers with a size of 2-48mm. Reference standard GB94.4-85 Elastic Washer Technical Conditions Spring Washer
Ordinary nuts are suitable for use in fixed-load equipment. Ordinary nuts are used to fix on stationary workpieces and cooperate with flat and spring washers to ensure the reliability of the nut. However, on moving workpieces with vibration loads, the equipment may The vibration caused the nut to loosen. As a kind of nut, the slotted nut is used to connect the two mechanical equipment tightly. It is mainly used in the occasions with vibration load or alternating load. It is used in conjunction with the split pin to ensure the nut lock. The reliability of tightening is often used as a lock nut to prevent the main nut from loosening back.
We have many years of experience in the production and sales of screws, nuts, flat washers, etc. The main products are: galvanized countersunk nuts, GB91 galvanized cotter pins, inverted tapered chemical anchor screws, long thread bolts and other products, we can provide you with The right fastener solution for you.
