M20 x 300mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel

Product code: HH931-M20-300-A4-80
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M20 x 300mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 300mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 300mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 300mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 300mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
M20 x 300mm Hex Bolt - Part Threaded (DIN 931) | Marine Grade A4-80 Stainless Steel
Quantity
Unit Price
(ex. VAT)
Unit Price
(inc. VAT)
1 - 99 £37.89 £45.47
100 - 999 £33.27 £39.92
1000 + £21.89 £26.27
£45.47 / each
Quantity:


Product Specification
Thread Size M20
Pitch 2.50mm
Length 300mm
Threaded Length 65mm
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 300mm Hex Head Bolt DIN 931 | A4-80 Stainless Steel

Designed for chemical processing sites, this M20 x 300mm DIN 931 hex bolt combines a plain shank section with a threaded end for strong alignment through prepared holes. The A4-80 Stainless Steel specification makes it suitable for marine, coastal and chemical environments where stronger corrosion resistant stainless fastening is required. This makes the M20 x 300mm hex head bolt useful when a standard metric fastening has to match existing drawings.

DIN 931 sizing improves interchangeability across maintenance stores, OEM builds and fabrication projects where consistent metric hardware is needed. The 65mm threaded section gives enough engagement for matched hardware while the 300mm overall length supports deep sections, packers and large fabricated joints.

Common Applications

  • Clamping corrosion resistant brackets in chemical processing sites
  • Fastening pipe support frames using M20 metric hardware
  • Installing plant access hardware where A4-80 Stainless Steel is specified
  • Joining stainless service panels requiring DIN 931 part threaded bolts

M20 x 300mm Hex Head Bolt DIN 931 Dimensions

  • Thread Size: M20
  • Length: 300mm
  • Threaded Length: 65mm
  • 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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