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                                  Bar

                                  Bar

                                  A straight length of rectangular, square or oval section material.

                                  Tolerances        
                                  Section dimensions: =<10mm  ±10% >10mm ±1mm
                                  Length: <100mm  ±1mm >=100mm +5%/-1%

                                   

                                  Bolt

                                  Bolt

                                  A threaded pin that can be screwed into a nut or a tapped hole to fasten items together. Bolts are available with different head styles and also in metric and inch-threaded sizes.

                                  Tolerances        
                                  Ceramics: ANSI B18.6.7M-1985  

                                   

                                  Chopped Fibre

                                  Chopped Fibre

                                  Fibres cut into short lengths called cut, staple or chopped fibre.

                                  Tolerances        
                                  Fibre diameter: ±25%      
                                  Number of strands: ±10%      
                                  Tex number: ±10%      
                                  Length: +5%/-1%      

                                   

                                  Crucible

                                  Crucible

                                  A vessel in which other materials may be heated or melted, usually at high temperatures.

                                  Tolerances        
                                  Height: ±10%      
                                  Wall Thickness: ±10%      
                                  Outside Dimensions: ±10%      

                                   

                                  Fabric

                                  Fabric

                                  Woven fabrics are made by the regular interlacing of two arrays of yarns at right angles to each other, these being referred to as the warp and weft (see also Non-woven fabric)

                                  Tolerances        
                                  Fabric thickness: ±25%      
                                  Number of yarns: ±10%      
                                  Tex number: ±10%      
                                  Size (linear dimension): <100mm ±5mm >=100mm ±5%

                                   

                                  Fibre

                                  Fibre

                                  Yarns or tows consisting of several approximately parallel individual filaments, each filament usually being smaller in diameter than a monofilament.

                                  Tolerances        
                                  Fibre diameter: ±25%      
                                  Number of strands: ±10%      
                                  Tex number: ±10%      
                                  Length: ±5% / -1%      

                                   

                                  Film

                                  Film

                                  A non-metallic sheet material with a thickness <0.5mm.

                                  Tolerances        
                                  Thickness: ±20%      
                                  Size (linear dimension): <100mm  ±1mm >=100mm +2%/-1%

                                   

                                  Flake

                                  Flake

                                  Flat, irregularly shaped pieces of material.  A maximum flake size is indicated, but individual flakes may vary greatly in size.

                                  Tolerances:  Dimensions shown are nominal

                                  Foam

                                  Foam

                                  A low density, permeable structure of cells and continuous ligaments offering a high surface area to volume ratio, and also a high strength to weight ratio.  Owing to the nature of this material, dimensions are nominal.

                                  Foil

                                  Foil

                                  Thin sheets of pure metal and metal alloys.  Due to their fragile nature, some foils are coated on one side with an acrylic or polyester support.  Where foils are supported they are indicated in the detailed item description.

                                  Light Tight Foil:  LT Foils are supplied without visible pinholes whereas NLT foils will normally contain pinholes, but may occasionally be free from pinholes.  Foils 0.025mm or more in thickness are supplied LT unless otherwise stated.  Foils less than 0.025mm are normally supplied NLT, however, if you require LT foils, please ask.  An additional charge may be made if we are able to supply LT foils.

                                  Tolerances        
                                  Thickness: <0.010mm ±25%    
                                    0.010-0.050mm ±15%    
                                    >0.050mm ±10%    
                                  Size (linear dimension): <100mm ±1mm >=100mm +2%/-1%

                                   

                                  Granule

                                  Granule

                                  Pellets of an approximately regular shape.  Granules may vary in size and, therefore, the dimensions stated are nominal.  In addition, the shape of a granule may vary from item to item.

                                  Tolerances: Dimensions shown are nominal.

                                  Honeycomb

                                  Honeycomb

                                  A cellular structure similar in appearance to natural honeycomb.  Owing to the nature of this material, dimensions are nominal.

                                  Insulated Wire

                                  Insulated Wire

                                  A single or multiple flexible strand of metal or alloy with an insulating sheath.

                                  Tolerances        
                                  Wire diameter: ±10%      
                                  Length: ±5%/-1%      

                                   

                                  Insulation thickness: Nominal values only

                                  Laminate

                                  Laminate

                                  Layers of material which have been bonded together by the use of heat, pressure and, possibly, adhesive.

                                  Tolerances        
                                  Thickness: ±10%      
                                  Size (linear dimension): =<100mm ±1mm >100mm ±2%/-1%

                                   

                                  Liquid

                                  Liquid

                                  A state of matter between a solid and a gas in which the shape of a given mass depends on the container, the volume being independent.

                                  Lump

                                  Lump

                                  A solid piece of material with no defined shape.

                                  Tolerances:  Dimensions shown are nominal

                                  Mesh

                                  Mesh

                                  Mesh is available as either a woven wire or electroformed product; in all cases, the quoted aperture sizes are nominal. Wire mesh: a material which is woven from metal wires to provide a thin grid with a regular series of holes. Electroformed mesh: a product made by electroplating the mesh geometry through a mask onto a substrate which is subsequently etched away.

                                  Tolerances        
                                  Thickness: woven: ±10% electroformed: ±20%
                                  Wire diameter: ±10%      
                                  Size (linear dimension): <100mm ±1mm >=100mm +2%/-1%

                                   

                                  Metalised Film

                                  Metalised Film

                                  Film which is coated with a metal. The thickness of the metal is measured and described in terms of the material's specific electrical resistance in ohms per square.

                                  Tolerances        
                                  Thickness: ±10%      
                                  Size (linear dimension): <100mm ±1mm >=100mm +2%/-1%

                                   

                                  Microfoil

                                  Microfoil

                                  An extremely thin sheet of metal or alloy mounted on a permanent support. This support cannot be removed without destroying the Microfoil.

                                  Tolerances        
                                  Thickness: ±30%      
                                  Size: ±20%      

                                   

                                  Microleaf

                                  Microleaf

                                  An extremely thin sheet of metal mounted on a removable support. Microleaf is not available for metals which are too brittle to be free standing. Microleaf is mounted on a specially treated support which allows separation of the metal film from the support. Full instructions on the method of removal are issued with each Microleaf supplied.

                                  Tolerances        
                                  Thickness: ±30%      
                                  Size: ±20%      

                                   

                                  Monofilament

                                  Monofilament

                                  A single strand of a non-metallic material.

                                  Tolerances        
                                  Diameter: ±20%      
                                  Length: +5%/-1%      

                                   

                                  Non-Woven Fabric

                                  Non-Woven Fabric

                                  Non-woven fabrics are made by methods other than weaving or knitting, the yarns and fibres being held together, often quite loosely, by means other than geometric interlacing. Due to the open and porous nature of this material, all other dimensions are nominal.

                                  Tolerances        
                                  Size (linear dimension): <100mm ±5mm >100mm ±5%

                                   

                                  Nut

                                  Nut

                                  Generally a flat piece of material with a threaded hole which can be screwed onto a bolt to fasten items together. Nuts typically have a hexagonal external shape. Nuts are available in metric and inch-threaded sizes.

                                  Tolerances        
                                  Ceramics: ANSI B18.2.4.1M-1979 (R1995)  

                                   

                                  Powder

                                  Powder

                                  Small particles with an approximately defined size range. Those materials described as alloy precursors are not true alloys - they are made by sintering a blend of powders of the component metals to achieve alloying by diffusion.  The resultant cake is ground and sieved to the required particle size range. Unless otherwise stated, the particle sizes shown are for guidance only. We do not guarantee either any particular size distribution between the quoted minimum and maximum sizes, or a specific particle shape.

                                  Tolerances:  Dimensions shown are nominal

                                  Rod

                                  Rod

                                  A straight length of circular section material.

                                  Tolerances        
                                  Diameter: <10mm ±10%    
                                    Polymer ±20%/-10%    
                                    Ceramic ±20%/-10%    
                                    >10mm ±5%    
                                    Polymer ±20%/-10%    
                                    Ceramic ±20%/-10%    
                                  Length: <100mm ±1mm >=100mm +5%/-1%

                                   

                                  Sheet

                                  Sheet

                                  Flat material with a thickness >0.5mm.

                                  Tolerances        
                                  Thickness:   ±10%    
                                    Ceramic ±20%    
                                    Composite ±20%    
                                    Polymer ±20%    
                                  Size (linear dimension): <100mm ±1mm >=100mm +2%/-1%

                                   

                                  Single Crystal

                                  Single Crystal

                                  A material grown as a monocrystal, generally to a specific orientation, dimension and surface finish. It may contain a dopant. Single crystals are usually made to order.

                                  Tolerances        
                                  Orientation: ±3°      

                                   

                                  Size: Sizes shown are nominal

                                  Sphere

                                  Sphere

                                  Small balls which are precision ground.

                                  Tolerances        
                                  Diameter: ±5%      

                                   

                                  Sputtering Target

                                  Sputtering Target

                                  A high purity material used as a source for sputtering, a cold vapourisation process in which atoms are physically removed from the target surface by ion bombardment.

                                  Tolerances        
                                  Thickness: ±5%      
                                  Size: ±5%      

                                   

                                  Tube

                                  Tube

                                  A hollow length of material normally circular in section. Most tubes are straight except those made of flexible polymer.

                                  Tolerances        
                                  Outside Diameter: <2mm ±0.05mm    
                                    Polymer ±10%    
                                    Ceramic ±10%    
                                    =<5mm ±0.1mm    
                                    Polymer ±10%    
                                    Ceramic ±10%    
                                    =>5mm ±5%    
                                    Polymer ±10%    
                                    Ceramic ±10%    
                                  Wall Thickness:   ±10%    
                                    Polymer ±20%    
                                    Ceramic ±20%    
                                  Length:  <100mm   ±1mm  >=100mm  +5%/-1%

                                   

                                  Washer

                                  Washer

                                  A thin, flat piece of material with a hole in the middle, used in conjunction with bolts and nuts to distribute the load of a threaded fastener.

                                  Tolerances        
                                  Ceramics: ANSI B18.22M-1981, R1990 (Reg)  

                                   

                                  Wire

                                  Wire

                                  A single or multiple flexible strand of pure metal or alloy.

                                  Tolerances        
                                  Wire diameter: ±10%      
                                  Length: +5%/-1%      

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