M5 dome nut in A4 stainless steel to DIN 1587. The domed cap covers the exposed end of a bolt thread for a safe, finished appearance - used on outdoor furniture, signage, architectural fixings, and play equipment. 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.
  • M5 dome nut marine grade 316 DIN 1587
  • DIN 1587 dome nut M5 A4 marine grade stainless steel, side view
  • Dome top view - M5 A4 stainless dome nut DIN 1587
  • Simfix product label - 1587A405PK10-SIM
  • Simfix product label - 1587A405PK50-SIM
M5 dome nut marine grade 316 DIN 1587
DIN 1587 dome nut M5 A4 marine grade stainless steel, side view
Dome top view - M5 A4 stainless dome nut DIN 1587
Simfix product label - 1587A405PK10-SIM
Simfix product label - 1587A405PK50-SIM

Simfix

Dome Nut DIN 1587 A4 A4 Stainless Steel (M5)

SKU 1587A405PK10-SIM
£3.60
Pack size:
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M5 dome nut in A4 stainless steel to DIN 1587. The domed cap covers the exposed end of a bolt thread for a safe, finished appearance - used on outdoor furniture, signage, architectural fixings, and play equipment. 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.
£3.60
M5 dome nut marine grade 316 DIN 1587 DIN 1587 dome nut M5 A4 marine grade stainless steel, side view Dome top view - M5 A4 stainless dome nut DIN 1587 Simfix product label - 1587A405PK10-SIM Simfix product label - 1587A405PK50-SIM
M5 dome nut marine grade 316 DIN 1587 DIN 1587 dome nut M5 A4 marine grade stainless steel, side view Dome top view - M5 A4 stainless dome nut DIN 1587 Simfix product label - 1587A405PK10-SIM Simfix product label - 1587A405PK50-SIM

This M5 dome nut (cap nut) is manufactured to DIN 1587 in A4 stainless steel (316 marine grade). DIN 1587 specifies a standard hex nut body with a closed, smooth domed cap that covers and protects the exposed end of the bolt thread. This eliminates the snag and injury risk of protruding cut thread ends and gives a finished, decorative appearance on visible bolt ends. The hex body tightens with a standard spanner, and the dome height accommodates the full thread protrusion beyond the nut face.

Typical applications

  • Marine and coastal outdoor furniture, signage, and balustrade ends
  • Swimming pool surrounds, leisure centres, and waterside structures
  • Boat interior fittings where bolt-end protection is needed
  • Public realm and coastal architecture requiring a finished appearance

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

Fastener styleDomed hexagon cap nut
StandardDIN 1587
MaterialA4 stainless steel (316)
Property classA4-50
Thread sizeM5
Head typeDome
Drive typeExternal hex (spanner)
Surface finishPlain (no plating)
HS commodity code7318163990
Recommended useMarine

RoHS and REACH compliant.

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