M8 x 50mm part-threaded hex bolt in A2 stainless steel, manufactured to DIN 931 at property class A2-70. The plain shank reduces stress concentration at the thread run-out, suited to shear-loaded joints and structural through-bolting. A2 (304 grade) gives good corrosion resistance for indoor and non-coastal outdoor use. Free next-day UK delivery on orders over £50.
  • M8 x 50mm hex bolt A2 stainless DIN 931 - partial thread
  • DIN 931 hex bolt M8 x 50mm A2-70 A2 stainless steel, side profile
  • Hexagon head detail - M8 x 50mm A2 stainless bolt, partial thread DIN 931
  • Simfix product label - 931A20805070PK10-SIM
  • Simfix product label - 4014A20805070PK50-SIM
M8 x 50mm hex bolt A2 stainless DIN 931 - partial thread
DIN 931 hex bolt M8 x 50mm A2-70 A2 stainless steel, side profile
Hexagon head detail - M8 x 50mm A2 stainless bolt, partial thread DIN 931
Simfix product label - 931A20805070PK10-SIM
Simfix product label - 4014A20805070PK50-SIM

Simfix

Hexagon Head Bolt DIN 931 A2-70 A2 Stainless Steel (M8 X 50)

SKU 931A20805070PK10-SIM
£7.40
Pack size:
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M8 x 50mm part-threaded hex bolt in A2 stainless steel, manufactured to DIN 931 at property class A2-70. The plain shank reduces stress concentration at the thread run-out, suited to shear-loaded joints and structural through-bolting. A2 (304 grade) gives good corrosion resistance for indoor and non-coastal outdoor use. Free next-day UK delivery on orders over £50.
£7.40
M8 x 50mm hex bolt A2 stainless DIN 931 - partial thread DIN 931 hex bolt M8 x 50mm A2-70 A2 stainless steel, side profile Hexagon head detail - M8 x 50mm A2 stainless bolt, partial thread DIN 931 Simfix product label - 931A20805070PK10-SIM Simfix product label - 4014A20805070PK50-SIM
M8 x 50mm hex bolt A2 stainless DIN 931 - partial thread DIN 931 hex bolt M8 x 50mm A2-70 A2 stainless steel, side profile Hexagon head detail - M8 x 50mm A2 stainless bolt, partial thread DIN 931 Simfix product label - 931A20805070PK10-SIM Simfix product label - 4014A20805070PK50-SIM

This M8 x 50mm hex bolt is manufactured to DIN 931 in A2 stainless steel (304 grade). DIN 931 specifies a part-threaded shank: the unthreaded plain section under the head spans the thickness of the joined parts, reducing stress concentration at the thread run-out and improving shear resistance compared with a fully threaded bolt. Property class A2-70 specifies a minimum tensile strength of 700 MPa - appropriate for structural connections and high-clamping-force applications. Pair with a matching M8 hex nut (DIN 934) or nyloc nut (DIN 985) for a complete through-bolted assembly.

Typical applications

  • Structural and heavy-duty mechanical connections requiring part-threaded shank
  • Steel-to-steel and steel-to-timber fixing in engineering assemblies
  • Guard rails, racking systems, and industrial fabrication
  • General mechanical and construction applications where A2 corrosion resistance is appropriate

Available in packs of 10 to 50, with free next-day UK delivery on orders over £50 and 30-day no-quibble returns.

Fastener styleHexagon head bolt, part threaded
StandardDIN 931
MaterialA2 stainless steel (304)
Property classA2-70
Thread sizeM8
Thread pitch1.25 mm (coarse)
Length50 mm
Head typeHex
Drive typeExternal hex (spanner)
Surface finishPlain (no plating)
HS commodity code7318157590
Recommended useWorkshop

RoHS and REACH compliant.

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