What are Screw Nut & Spacer
  • Nut is a nut , which is screwed together with bolt or screw for fastening. It is an original for all production machinery There are many kinds of nuts. We often have national standard, British standard, American Standard and Japanese standard nuts. Nuts are divided into carbon steel, high strength, stainless steel, plastic steel and other types according to different materials. According to the product attributes, the corresponding national standard numbers are divided into ordinary, non-standard, (old) national standard, new national standard, American system, British system and German standard.

  • Classification of screws and nuts

    Hex Cap Nuts /Hex serrated nuts Hex / flange nuts Hex / coupling nuts (high nuts) / Round nuts / Square nuts / Pipe nuts

    Wheel housing nuts / Wing nuts / U nuts / T-nuts / Eye nuts / Toothed nut kep nuts / Toothed nut clinch nuts /

    Weld nuts / High tension nuts / Construction nuts / Stainless steel nuts / Brass nuts / Aluminum nuts / Alloy steel nuts

    Heavy duty wheel hub nuts / Iron welding bag cap acorn cap nuts / All-metal preset torque type nuts / Gecko nut anchor nuts

    Big size nuts / Closed end acorn nuts / Disc washer nuts / Iron cap + nylon ring combined cap DIN 986 domed cap nuts

    Flange nylon insert lock nuts / Flat WASER nuts / Hex slotted nut / Self locking nuts / Sliding nuts / SLN self-locking nuts

    Other special nuts / Spring nuts / Stainless steel flange nuts / Stainless steel steel flange nylon insert lock nuts

    Stainless steel hex nuts / Stainless steel nylon insert lock nuts /Zinc die casting nuts / Common hex nuts / Hex hex nuts

    Thin nut HEX JAM NUTS / Nylon insert lock nuts / Hex machine screw nut

  • What is a gasket?

    The gasket is made of paper, rubber sheet or copper sheet and placed between two planes to strengthen the sealing. In order to prevent fluid leakage, it is a sealing element arranged between the static sealing surfaces.

    Gasket is a mechanical seal between two objects, which is usually used to prevent pressure, corrosion and natural thermal expansion, cold contraction and leakage of pipeline between two objects. Since machined surfaces cannot be perfect, irregularities can be filled with shims. Gaskets are usually made of sheet materials, such as pad paper, rubber, silicone rubber, metal, cork, felt, neoprene, nitrile rubber, glass fiber or plastic polymer (such as polytetrafluoroethylene). Gaskets for specific applications may contain asbestos.

    A washer is a loophole (usually in the middle) in a thin plate (usually circular) and is usually a threaded fastener for distributing the load. Other uses are as spacer, spring (Belleville gasket, wave gasket), wear pad, pre display device, lock device. Rubber gaskets are also used in faucets (valves) to cut off the flow of liquid or gas. Rubber or silicon gaskets can also be used to reduce fan vibration. Generally, the outer diameter of the gasket is about twice the inner diameter.

  • Type of gasket

    According to its material and structural characteristics, gaskets can be divided into non-metallic gaskets, metal gaskets and metal non-metallic composite gaskets, which can be subdivided into several types.

    Non metallic gasket / Rubber gasket / Asbestos free fiber rubber gasket / Flexible graphite metal composite gasket

    PTFE gasket / PTFE coated gasket / Other types of non-metallic gaskets / Metal nonmetal composite gasket

    Corrugated gasket / Spiral wound gasket / Metal toothed composite gasket / Metal clad gasket

    Metal wave tooth composite gasket / Other types of metal composite gaskets / Metal gasket / Metal flat gasket

    Metal corrugated gasket / Metal toothed gasket / Metal ring gasket / Metal lens gasket / Metal O-ring gasket

    The metal ring gasket can be divided into / Octagonal ring gasket / Oval ring gasket

    RX and BX type self tightening sealing ring gasket

    Washer washer is the part between the connector and the nut, which is generally a flat metal ring.

    Non metallic gasket is a gasket made of asbestos, rubber, synthetic resin, polytetrafluoroethylene and other non metals. A non metallic jacket gasket non metallic jacket gasket coated with a layer of synthetic resin.

    Semi metallic gasket is a gasket made of metal and non-metallic materials, such as spiral wound gasket and metal coated gasket. A spiral wound gasket is a gasket spirally wound by V-shaped or W-shaped cross-section metal belt sandwiched with non-metal belt.

    1) The inner ring is a metal ring arranged on the inner ring of the spiral wound gasket.

    2) The outer ring is a metal ring arranged on the outer ring of the spiral wound gasket.

    3) Metal cladding.

    Metallic gasket a gasket made of steel, aluminum, copper, nickel or Monel alloy.

    Spiral wound gasket refers to the gasket wound into a ring with metal belt (generally V-shaped steel belt) and non-metallic belt. The metal belt and non-metallic belt are wound alternately. Because of their good elasticity, they are widely used in flange sealing structures in petrochemical, chemical, electric power and other industries. According to the specific position, steel rings can be added to the inner or outer layer of the gasket to locate or strengthen.


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