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  • [M] Diameter (Screw Thread) Nominal
  • [L] Length(mm)
      [10-90/1mm unidades]
    • Material
          • Stainless Steel
        • Surface Treatment
        • Strength Class (Stainless Steel)
        • Thread Length ℓ(mm)
            [10-40/1mm unidades]
          • Type
          • CAD
          • Dias de envio estimados
            • Tudo
            • Dentro de 7 dias úteis

          Socket head screws / flat head / hexagon socket / steel, stainless / burnished, nickel-plated / A4-80, A2-50

          Número da peça:

          Indefinido. 4 candidatos encontrados.
          Quantidade:

          Desenho de contorno e tabela de especificações

          Back to the Category Flat Head Screws/Low Head Screws

          Technical Drawing - Flat Head Screws
           
          Low Head Cap Screws/Configurable Length:Related Image
           

          Available dimensions and tolerances can be found under the tab More Information.

           

          Basic Properties (e.g., material, hardness, coating, tolerance) - Flat Head Screws
           
          Type Material Surface TreatmentStrength Class
          FCBSEN 1.1191 Equiv.Black Oxide8.8
          FCBSMElectroless Nickel Plating
          FCBSSTEN 1.4301 Equiv.-A2-50

          Further specifications can be found under the tab More Information.

           

          Composition of a Product Code - Flat Head Screws
           
          Part Number-L-
          FCBS8-38-10

           

          General Information - Flat Head Screws

           

          Flathead Screw Selection Details

          - Drive: hex (external hex), hexagon socket, hex socket (Torx)

          - Strength classes: 8.8, 10.9, A2-50, A4-80

          - Threads: M2, M2.5, M2.6, M3, M4, M5, M6, M8, M10, M12

          - Thread lengths: 3 mm – 50 mm

          - Surface coating: burnished, nickel-plated, chrome-plated, LTBC coating

          - Materials: stainless steel, steel

           

          Description/Basics

          The screwed connection is one of the most commonly used methods among the soluble compounds. Due to their flat head, flathead screws have various advantages over conventional screws.

          Screws with a flat head are often utilised in places that need to form a flat level as much as possible.
          Due to their head geometry, flathead screws allow counterbores to be made less deep or completely omitted. This allows covers to be made thinner walls and thus save weight. These advantages also result in cost savings through material savings and the elimination or shortening of production steps. The MISUMI flat-head screws are thus ideal for mounting sheet metal, thin panels, housing covers and other covers.
          As opposed to the head form of commercially available screws, the flathead screw reduces the risk of injury at accessible locations, such as housing covers, mounting flaps, etc. This also eliminates the frequently required plastic caps on large screw heads.

          Contrary to the standard flathead screws (DIN 921, DIN 922 and DIN 923), MISUMI has flathead screws with hexagon socket, hexagon socket (Torx) and external hexagon. These drive types reduce slipping during assembly compared to typical cross or slotted drives.

          MISUMI offers flathead screws in various strength classes.
          However, due to the delicate head of flathead screws, the strength on the head can be lower than that on the thread, since there is less material available. The respective strength class is therefore assigned to the individual flathead screws (see Basic Properties).

           

          Areas of Application

          Flathead screws are intended for fastening of joining parts. Often, the flathead screws are used for housing covers or in applications requiring low weight.
          Thanks to the multi-selectable surface treatments, flathead screws are particularly resistant to environmental influences. This allows flathead screws to be used in almost all industry sectors of plant engineering and mechanical engineering.
          The benefits of using flathead screws are versatile. The main advantages of flathead screws are their low weight and space savings.
          To utilise a flathead screw with vent function, e.g., for pressure equalization, MISUMI also offers hollow screws with a flat head.

           

          Allen screws/extra flat head: related image display

          (1) Through-hole for exhaust air

           

          Materials

           

          Strength classes

          The strength class gives the tensile strength [R m ] and yield strength [R e ], or expansion limit [R p-0.2] of the screw.
          Screws that are subject to a strength class are often marked by the strength class on the screw head. For some screws, the reference to the strength class is missing. In such cases, please refer to the Screw Data Sheet (see Basic Properties).
          The screw strength class is an indication of the tensile strength and the expansion limit of a screw. The higher the specification of the strength class, the higher the tensile strength and expansion limit. In principle, a distinction is made between steel and stainless steel (stainless steel).
          Stainless steel screws are marked with the letters A, C and F (e.g., A2-50). Steel screws are marked with two numbers, separated by a dot (e.g., 8.8).
          The tensile strength and elongation limit can be determined based on this information. Which of the two values and safety number are used for the further calculation of the screws depends on the applied load case.

           

          Allen screws/extra flat head: related image display

          Example of a strength marking

           

          Tensile strength steel

          Example: 8.8

          R m = 8 x 100 N/mm 2 = 800 N/mm 2

          The expansion limit of the screw material is the resistance value that can be applied to the material without permanent deformation. Thus, the screw can return to its original length after this stress (elastic range).
          If the elastic range is exceeded, there is a permanent (plastic) deformation, which can end in a tear/fracture of the material upon further stress.
          To determine the value, both values of the strength specification are multiplied with each other and additionally by a factor of 10.

          Example 8.8

          R p-0.2 = 8 x 8 x 10 N/mm 2 = 640N /mm 2

           

          Tensile strength stainless steel

          For stainless steel screws, the strength specification begins with the specification of the material group used.
          The most common stainless steel screw is the A2 stainless steel screw, which is manufactured from (colloquially speaking) V2A material. In this example, the A2 screw is made of austenitic stainless steel.
          Ferritic stainless steel screws are often marked with a [F] at the beginning and martensitic stainless steel types with a [C].
          Unlike the steel screws, the second value of the strength specification is multiplied by a factor of 10 for the stainless steel screws in order to determine the tensile strength of the screw material. The expansion limit [R p-0.2] must be determined in tabular form based on the expansion limit of the raw material or the manufacturer.

          Example A2-50

          R m = 50 x 10 N/mm 2 = 500 N/mm 2

          Screws without specification of this strength classification have manufacturer-bound values that must be taken from the respective data sheets or manufacturer information. This often occurs with screws with special shape and treatment.

           

          Coatings

          MISUMI’s flathead screws are available in burnished, chrome-plated, or nickel-plated to best protect them from corrosion.
          As an alternative to one of these surface treatments, flathead screws can also be coated with LTBC. The LTBC coating (Low Temperature Black Chrome Platinum) is a surface coating that protects against corrosion and has low reflection. The coating consists of a 5 μm thick chrome ceramic layer with fluoropolymer infusion and forms a black film. In addition, the LTBC coating is resistant to cracking and bending and it is thus resistant to peeling due to extreme or repeated bending. This makes LTBC-coated flathead screws particularly suitable for areas where corrosion or light reflections are undesirable.

           

          Dimensions

          Compared to an M5 standard cylinder head screw with 5 mm head height, with a flathead screw it is possible to save up to 4 mm of head height.

           

          Allen screws/extra flat head: related image display

          (1) Standard cylinder head screws, (2) Flat head, (3) Safety screws, (4) Very flat head, (5) Ultra flat head

           

          ProductsHexagon socket screwsflat headSafety screwsvery flat headultra flat head
          Allen socket screwsAllen socket screwsAllen socket screwsAllen socket screwsAllen socket screws
          P. 172, 174, 175P. 194P. 185P. 195P. 196
          Head height (in mm)
          M221.31.31.1 (min.*)0.5
          2.52.51.61.51.3 (min.*)0.6
          3321.651.50.8
          442.82.21.50.9
          553.52.751.51
          6643.31.51.2
          8854.41.5-
          101065.51.5-
          12127---

          Bolt Head Height Comparison Chart
          *Head height varies by material.

           

          Instructions for Use / Installation Information - Flat Head Screws

           

          Tightening torques/torques

           

          Productsflat headvery flat headultra flat head
          SteelSteel, stainless steelStainless steelSteelStainless steelSteelSteel
          Strength class10.98.8, A4-80A2-505.8 (M10, 4.8)---
          Tensile strength (N/mm 2)1040800500500 (M10, 400)400350 (M2, 200)350 (M2, 200)
          M2--0.250.250.250.160.178
          2.5--0.420.820.420.35-
          31.10.90.80.90.80.60.63
          44.01.81.61.81.61.11.5
          56.13.63.23.23.02.23.0
          610.57.26.55.25.05.05.2
          818.410.89.79.08.6--
          10-31.528.416.215.4--
          12-45.040.5----

          Note: The above values are for comparison purposes only (reference values).

          Further specifications can be found under the tab More Information.

           

          Installation Information

           

          Bore hole dimensions screw dimensions

          Dimensions of the screw and counterbores

           

          Thread
          (d)
          flat headvery flat head
          (stainless steel screw)
          ultra flat head
          Hexagon socket
          ultra flat head
          Torx
          d'dkD'kH'd'dkD'kH'd'dkD'kH'd'dkD'kH'
          M2 2.53.851.31.54451.1
          (1.5)
          1.3
          (1.7)
          2.5450.50.72.5450.50.7
          M2.534.55.51.61.83561.3
          (1.5)
          1.5
          (1.7)
          3560.60.8-----
          M33.55.56.522.33.5671.3
          (1.5)
          1.6
          (1.8)
          3.5670.81.13.5780.81.1
          M44.5782.83.24.5891.51.93.4891.11.34.5890.91.3
          M55.58.59.53.53.95.59101.51.95.59101.41.45.591011.4
          M66.5101144.56.510111.526.510111.71.76.512131.21.7
          M89131455.6913141.52.1----------
          M10111617.566.81116
          (15)
          17.5
          (16.5)
          1.52.3----------
          M1214182078---------------

          Further specifications can be found under the tab More Information.

           

          Supplementary Article

           

          Washers

          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf

          Nuts

          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf

           

          Inserts

          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf

           

          Mounting Plates and Brackets

          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf

           

          Anaerobic Adhesive

          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf

           

          Industrial Applications

           

          3D printer industry
          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf
          Automotive industry
          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf
          Pharmaceutical industry
          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf
          Packaging industry
          Flachkopfschraube - Flachkopfschrauben - Schrauben mit flachem Kopf - Schraube mit flachem Kopf - Schrauben mit niedrigem Kopf - Schraube mit niedrigem Kopf

            

          Lista de números de peça

          Número de itens

          [M] Diameter (Screw Thread) Nominal

          [L] Length

          (mm)

          Material

          Surface Treatment

          Strength Class (Steel)

          Strength Class (Stainless Steel)

          Thread Length ℓ

          (mm)

          RoHS?Quantidade mínima de encomenda
          4
          10 ~ 50
          [Stainless Steel] EN 1.4301 Equiv.
          Not Provided
          -
          A2-50
          10 ~ 40
          10
          1 unidades
          5
          10 ~ 60
          [Stainless Steel] EN 1.4301 Equiv.
          Not Provided
          -
          A2-50
          10 ~ 40
          10
          1 unidades
          6
          10 ~ 80
          [Stainless Steel] EN 1.4301 Equiv.
          Not Provided
          -
          A2-50
          10 ~ 40
          10
          1 unidades
          8
          10 ~ 90
          [Stainless Steel] EN 1.4301 Equiv.
          Not Provided
          -
          A2-50
          10 ~ 40
          10
          1 unidades
          Preço unitário (excluindo IVA)(Preço unitário incluindo IVA)
          Data de envio standard
          -
          ( - )
          7 dias úteis
          -
          ( - )
          7 dias úteis
          -
          ( - )
          7 dias úteis
          -
          ( - )
          7 dias úteis

          Informações detalhadas

          Contorno e especificações

          Back to the Category Flat Head Screws/Low Head Screws

          Technical Drawing - Flat Head Screws

           

          Low Head Cap Screws/Configurable Length:Related Image
           

           

          Specification Tables - Flat Head Screws


          Overview of screws as PDF
           


          Part NumberL 1mm Incrementℓ1mm IncrementAEBt
          max.
          Unit Price
          TypeML10~5051~L Max.
          (Coarse)FCBSFCBSMFCBSSTFCBSFCBSMFCBSST
          FCBS
          FCBSM
          FCBSST
          410~5010~40
          ℓ≤L
          72.82.52.3   ---
          510~608.53.532.7      
          610~8010443      
          810~9013553.8      
          When ℓ=L, there will be incomplete threads (2 pitches Max.) below the screw head