M12 x 20mm Hex (Non Serrated) Flange Bolt (DIN 6921) | Marine Grade A4 Stainless Steel

Product code: FHH6921-M12-20-A4
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M12 x 20mm Hex (Non Serrated) Flange Bolt (DIN 6921) | Marine Grade A4 Stainless Steel
M12 x 20mm Hex (Non Serrated) Flange Bolt (DIN 6921) | Marine Grade A4 Stainless Steel
M12 x 20mm Hex (Non Serrated) Flange Bolt (DIN 6921) | Marine Grade A4 Stainless Steel
M12 x 20mm Hex (Non Serrated) Flange Bolt (DIN 6921) | Marine Grade A4 Stainless Steel
M12 x 20mm Hex (Non Serrated) Flange Bolt (DIN 6921) | Marine Grade A4 Stainless Steel
M12 x 20mm Hex (Non Serrated) Flange Bolt (DIN 6921) | Marine Grade A4 Stainless Steel
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Unit Price
(ex. VAT)
Unit Price
(inc. VAT)
1 - 99 £1.29 £1.55
100 - 499 £1.24 £1.49
500 - 999 £1.08 £1.30
1000 + £0.88 £1.05
£1.55 / each
Quantity:


Product Specification
Thread Size M12
Thread Length 20mm
Pitch 1.75mm
Material A4 Stainless Steel
Across Flats 16mm
Head Height 11.5mm
Flange Diameter 26.6mm
Standard DIN 6921
Head Style Flanged Hex Head

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M12 x 20mm Flanged Hex Head Bolt (DIN 6921) | A4 Stainless Steel

The M12 x 20mm A4 Stainless Steel flanged hex head bolt is specified for transport equipment where a standard hex bolt would need extra load spreading. Its 20mm thread length, 1.75mm pitch and 11.5mm head height make it easy to match with existing DIN 6921 fastener specifications.

The DIN 6921 form combines a hex drive with a wider seating face, helping to spread clamp load and reduce surface marking on brackets, plates or fabricated parts. The A4 stainless steel material gives marine grade stainless protection while the DIN 6921 specification keeps the fastener compatible with standard metric assemblies.

Common Applications

  • Transport Equipment: fixing components on trailers, equipment trolleys and handling frames.
  • Machinery Builds: provides a reliable flange face for load-spreading under movement.
  • Maintenance Work: replacing worn fixings during planned servicing.
  • Fabrication: creating repeatable DIN 6921 joints across metal assemblies.

M12 x 20mm Flanged Hex Head Bolt Dimensions

  • Thread Size: M12
  • Thread Length: 20mm
  • Pitch: 1.75mm
  • Flange Diameter: 26.6mm
  • Head Height: 11.5mm
  • Across Flats: 16mm
  • Standard: DIN 6921
  • Head Style: Flanged Hex Head
  • Material: A4 Stainless Steel

Installation Advice

Choose stainless steel where corrosion resistance is more important than the lowest unit cost. Tighten using the correct socket or spanner size and follow the required torque setting for the assembly.

Related Fasteners

Most commonly used in conjunction with Washers and Nuts, these products help hold fasteners in place and join two or more parts together. We also offer Socket Head Screws

For a standard non-flanged head, view our Hex Head Bolts DIN 931. For a fully threaded hex option, view our Hex Set Screws DIN 933.

View our full range of Flanged Hex Head Bolts DIN 6921.

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