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Hexagon Flange Bolt with Serrated Flange

A hex head bolt with a built-in flange that replaces a separate washer. Serrations under the flange grip the surface and resist loosening. Tighten with a standard hex socket or wrench. Commonly used in vehicles, machinery frames, and sheet metal joints.

In stockShips within 3 working daysMade to orderShips within 15 working days

M20 × 2.545 variantsb46s27max.k17.1
LengthmmMaterialGradeFinishStockMOQpcs≈ kg/ 1,000 pcsQuantitypcs
50Stainless SteelA2-70PassivatedIn stock500190.51
50Stainless SteelA2-70PlainIn stock500190.51
50Stainless SteelA4-80PassivatedIn stock500190.51
50Stainless SteelA4-80PlainIn stock500190.51
50Alloy SteelClass 10.9PlainIn stock500188.58
50Alloy SteelClass 10.9Zinc PlatedIn stock500188.88
50Alloy SteelClass 10.9DacrometIn stock500188.77
50Alloy SteelClass 10.9BlackenedIn stock500188.58
50Alloy SteelClass 10.9PhosphateIn stock500188.58
50Carbon SteelClass 8.8PlainIn stock500188.58
50Carbon SteelClass 8.8Zinc PlatedIn stock500188.88
50Carbon SteelClass 8.8DacrometIn stock500188.77
50Carbon SteelClass 8.8BlackenedIn stock500188.58
50Carbon SteelClass 8.8PhosphateIn stock500188.58
50Carbon SteelClass 8.8Hot Dip GalvanizedIn stock500190.73
70Stainless SteelA2-70PassivatedIn stock500240.33
70Stainless SteelA2-70PlainIn stock500240.33
70Stainless SteelA4-80PassivatedIn stock500240.33
70Stainless SteelA4-80PlainIn stock500240.33
70Alloy SteelClass 10.9PlainIn stock500237.91
70Alloy SteelClass 10.9Zinc PlatedIn stock500238.27
70Alloy SteelClass 10.9DacrometIn stock500238.13
70Alloy SteelClass 10.9BlackenedIn stock500237.91
70Alloy SteelClass 10.9PhosphateIn stock500237.91
70Carbon SteelClass 8.8PlainIn stock500237.91
70Carbon SteelClass 8.8Zinc PlatedIn stock500238.27
70Carbon SteelClass 8.8DacrometIn stock500238.13
70Carbon SteelClass 8.8BlackenedIn stock500237.91
70Carbon SteelClass 8.8PhosphateIn stock500237.91
70Carbon SteelClass 8.8Hot Dip GalvanizedIn stock500240.50
80Stainless SteelA2-70PassivatedIn stock500265.24
80Stainless SteelA2-70PlainIn stock500265.24
80Stainless SteelA4-80PassivatedIn stock500265.24
80Stainless SteelA4-80PlainIn stock500265.24
80Alloy SteelClass 10.9PlainIn stock500262.57
80Alloy SteelClass 10.9Zinc PlatedIn stock500262.96
80Alloy SteelClass 10.9DacrometIn stock500262.81
80Alloy SteelClass 10.9BlackenedIn stock500262.57
80Alloy SteelClass 10.9PhosphateIn stock500262.57
80Carbon SteelClass 8.8PlainIn stock500262.57
80Carbon SteelClass 8.8Zinc PlatedIn stock500262.96
80Carbon SteelClass 8.8DacrometIn stock500262.81
80Carbon SteelClass 8.8BlackenedIn stock500262.57
80Carbon SteelClass 8.8PhosphateIn stock500262.57
80Carbon SteelClass 8.8Hot Dip GalvanizedIn stock500265.38
Need another length in M20?Made to order · ask for a price

45 combinations shown

Matching components

Hexagon Full Nut DIN 934Hex NutDIN 934 · M3–M36Nylon Insert Lock Nut DIN 985Nylon Insert Lock NutDIN 985 · M3–M36Serrated Hex Flange Nut DIN 6923Serrated Hex Flange NutDIN 6923 · M5–M20

Questions

Why is there no hot-dip galvanized option below M8?

The zinc layer is too thick for smaller threads, so hot-dip galvanizing starts at M8.

Order assurance

Reports & inspection

  • EN 10204 3.1 material certificate
  • Dimensional inspection report
  • Certificate of conformity
  • Mechanical test report
  • Chemical analysis report
  • Coating inspection report
  • Batch and lot traceability

Packaging & delivery

  • Bulk carton packing
  • Small boxes with outer cartons
  • Palletized shipment
  • Fumigation-free pallets
  • Inner poly bags
  • Buyer branding and labels

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