M20 x 55mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel

Product code: HH931-M20-55-A4-80
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M20 x 55mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 55mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 55mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 55mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 55mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 55mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
Quantity
Unit Price
(ex. VAT)
Unit Price
(inc. VAT)
1 - 99 £6.43 £7.72
100 - 999 £5.74 £6.89
1000 + £3.67 £4.41
£7.72 / each
Quantity:


Product Specification
Thread Size M20
Pitch 2.50mm
Length 55mm
Threaded Length 46mm
Material A4-80 Stainless Steel
Across Flats 30mm
Head Height 12.9mm
Head Style Hex Head
Standard DIN 931

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M20 x 55mm Hex Head Bolt DIN 931 | A4-80 Stainless Steel

This M20 x 55mm hex head screw style bolt is made for automotive manufacturing lines, giving a clean externally driven fixing for metal sections, brackets and equipment frames. Its A4-80 Stainless Steel material choice is well suited to marine, coastal and chemical environments where stronger corrosion resistant stainless fastening is required. It is a practical option for buyers searching for a part threaded hexagon bolt with measured DIN 931 geometry.

The partially threaded design is useful where the shank passes through one component and the threaded end clamps against the mating part, helping reduce movement in bracketed assemblies. With a 2.50mm pitch and 30mm across flats head, it is easy to specify for large machinery, steelwork and plant installations.

Common Applications

  • Fastening fixture plates in automotive manufacturing lines
  • Installing conveyor fixtures using M20 metric hardware
  • Joining assembly cell frames where A4-80 Stainless Steel is specified
  • Building guard brackets requiring DIN 931 part threaded bolts

M20 x 55mm Hex Head Bolt DIN 931 Dimensions

  • Thread Size: M20
  • Length: 55mm
  • Threaded Length: 46mm
  • Pitch: 2.50mm
  • Across Flats: 30mm
  • Head Height: 12.9mm
  • Material: A4-80 Stainless Steel
  • Standard: DIN 931
  • Head Style: Hex Head

Compatible Fasteners

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

Our hex head screws are also available as fully threaded Hex Head Screws.

View our full Hex Head Bolts DIN 931 range.

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