M4 hex nut in A4 marine grade stainless steel to DIN 934. Full-height hexagon form, compatible with all M4 bolts, machine screws, and threaded rod to metric coarse pitch. Suitable for general indoor and outdoor assemblies, electronics, and light mechanical fittings. Free next-day UK delivery on orders over £50.
  • M4 hexagon nut marine grade 316 DIN 934
  • DIN 934 hex nut M4 A4 marine grade stainless steel, side view
  • Head-on view - M4 A4 stainless hexagon nut DIN 934
  • Simfix product label - 934A40040PK20-SIM
  • Simfix product label - 934A40040PK100-SIM
M4 hexagon nut marine grade 316 DIN 934
DIN 934 hex nut M4 A4 marine grade stainless steel, side view
Head-on view - M4 A4 stainless hexagon nut DIN 934
Simfix product label - 934A40040PK20-SIM
Simfix product label - 934A40040PK100-SIM

Simfix

Hexagon Full Nut DIN 934 A4 Stainless Steel (M4)

SKU 934A40040PK20-SIM
£3.60
Pack size:
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M4 hex nut in A4 marine grade stainless steel to DIN 934. Full-height hexagon form, compatible with all M4 bolts, machine screws, and threaded rod to metric coarse pitch. Suitable for general indoor and outdoor assemblies, electronics, and light mechanical fittings. Free next-day UK delivery on orders over £50.
£3.60
M4 hexagon nut marine grade 316 DIN 934 DIN 934 hex nut M4 A4 marine grade stainless steel, side view Head-on view - M4 A4 stainless hexagon nut DIN 934 Simfix product label - 934A40040PK20-SIM Simfix product label - 934A40040PK100-SIM
M4 hexagon nut marine grade 316 DIN 934 DIN 934 hex nut M4 A4 marine grade stainless steel, side view Head-on view - M4 A4 stainless hexagon nut DIN 934 Simfix product label - 934A40040PK20-SIM Simfix product label - 934A40040PK100-SIM

This M4 full hex nut is manufactured to DIN 934 in A4 stainless steel (316 marine grade). DIN 934 (ISO 4032) is the most widely specified general-purpose hex nut standard, with defined width across flats, height, and metric coarse thread tolerance to ensure consistent fit across suppliers. The full-height hex form provides maximum thread engagement and clamping force compared with thin (jam) nuts - suited to joints where full load-bearing capacity is required. Compatible with any M4 bolt, machine screw, or threaded rod conforming to the same metric coarse pitch specification. Where vibration resistance is a concern, pair with a DIN 985 nyloc nut on the reverse or use a spring washer under the nut face.

Typical applications

  • Marine and coastal assemblies - boat hardware, marina pontoons, jetty fixings
  • Swimming pool surrounds, water treatment plant, and pump assemblies
  • Offshore and coastal structures with saltwater and chloride exposure
  • Food processing, chemical plant, and washdown environments

Available in packs of 20 to 100, with free next-day UK delivery on orders over £50 and 30-day no-quibble returns.

Fastener styleFull hexagon nut
StandardDIN 934
MaterialA4 stainless steel (316)
Property classA4-70
Thread sizeM4
Thread pitch0.7 mm (coarse)
Head typeHexagon
Drive typeExternal hex (spanner)
Surface finishPlain (no plating)
HS commodity code7318163990
Recommended useMarine

RoHS and REACH compliant.

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