M8 x 50mm fully threaded hex bolt in A4 marine grade stainless steel, manufactured to DIN 933 at property class A4-70. The full-length thread makes it versatile for through-bolting and general M8 fastening across light engineering, joinery, and general fabrication. A4 (316) marine grade gives outstanding resistance to saltwater and chloride corrosion - the right choice for coastal, marine, and pool environments. Free next-day UK delivery on orders over £50.
  • M8 x 50mm hex bolt marine grade 316 DIN 933 - fully threaded
  • DIN 933 hex bolt M8 x 50mm A4-70 A4 marine grade stainless steel, side profile
  • Hexagon head detail - M8 x 50mm A4 stainless bolt, full thread DIN 933
  • Simfix product label - 933A40805070PK10-SIM
  • Simfix product label - 4017A40805070PK50-SIM
M8 x 50mm hex bolt marine grade 316 DIN 933 - fully threaded
DIN 933 hex bolt M8 x 50mm A4-70 A4 marine grade stainless steel, side profile
Hexagon head detail - M8 x 50mm A4 stainless bolt, full thread DIN 933
Simfix product label - 933A40805070PK10-SIM
Simfix product label - 4017A40805070PK50-SIM

Simfix

Hexagon Head Set Screw DIN 933 A4-70 A4 Stainless Steel (M8 X 50)

SKU 933A40805070PK10-SIM
£7.72
Pack size:
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M8 x 50mm fully threaded hex bolt in A4 marine grade stainless steel, manufactured to DIN 933 at property class A4-70. The full-length thread makes it versatile for through-bolting and general M8 fastening across light engineering, joinery, and general fabrication. A4 (316) marine grade gives outstanding resistance to saltwater and chloride corrosion - the right choice for coastal, marine, and pool environments. Free next-day UK delivery on orders over £50.
£7.72
M8 x 50mm hex bolt marine grade 316 DIN 933 - fully threaded DIN 933 hex bolt M8 x 50mm A4-70 A4 marine grade stainless steel, side profile Hexagon head detail - M8 x 50mm A4 stainless bolt, full thread DIN 933 Simfix product label - 933A40805070PK10-SIM Simfix product label - 4017A40805070PK50-SIM
M8 x 50mm hex bolt marine grade 316 DIN 933 - fully threaded DIN 933 hex bolt M8 x 50mm A4-70 A4 marine grade stainless steel, side profile Hexagon head detail - M8 x 50mm A4 stainless bolt, full thread DIN 933 Simfix product label - 933A40805070PK10-SIM Simfix product label - 4017A40805070PK50-SIM

This M8 x 50mm fully threaded hex bolt is manufactured to DIN 933 in A4 stainless steel (316 marine grade). DIN 933 specifies a hex head bolt with thread running the full length of the shank, making it suitable for nuts, threaded inserts, and through-bolted joints. Property class A4-70 indicates a minimum tensile strength of 700 MPa in A4 (316) marine-grade stainless steel. The fully threaded shank provides maximum thread engagement in tapped holes and stud applications where partial-thread bolts would leave un-engaged shank exposed.

Typical applications

  • Marine and coastal structures - jetties, pontoons, boat fixings
  • Swimming pool plant, water treatment facilities, and pump housings
  • Offshore and saltwater environments with prolonged wet exposure
  • Chemical plant, food processing, and washdown environments

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 set screw, fully threaded
StandardDIN 933
MaterialA4 stainless steel (316)
Property classA4-70
Thread sizeM8
Thread pitch1.25 mm (coarse)
Length50 mm
Head typeHex
Drive typeExternal hex (spanner)
Surface finishPlain (no plating)
HS commodity code7318157590
Recommended useMarine

RoHS and REACH compliant.

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