M5 x 16mm button head socket screw in A4 marine grade stainless steel to ISO 7380-1. The wide, low-profile dome head distributes load across a larger bearing surface than a cap screw, ideal for furniture, signage, and decorative or thin-panel fixings. 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 x 16mm socket button screw marine grade 316 ISO 7380
  • ISO 7380 socket button screw M5 x 16mm A4 marine grade stainless steel, side profile
  • Low-profile button head detail - M5 x 16mm A4 stainless button screw ISO 7380
  • Simfix product label - 7380A405016PK10-SIM
  • Simfix product label - 7380A405016PK50-SIM
M5 x 16mm socket button screw marine grade 316 ISO 7380
ISO 7380 socket button screw M5 x 16mm A4 marine grade stainless steel, side profile
Low-profile button head detail - M5 x 16mm A4 stainless button screw ISO 7380
Simfix product label - 7380A405016PK10-SIM
Simfix product label - 7380A405016PK50-SIM

Simfix

Hexagon Socket Button Screw ISO 7380-1 A4 Stainless Steel (M5 X 16)

SKU 7380A405016PK10-SIM
£4.03
Pack size:
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M5 x 16mm button head socket screw in A4 marine grade stainless steel to ISO 7380-1. The wide, low-profile dome head distributes load across a larger bearing surface than a cap screw, ideal for furniture, signage, and decorative or thin-panel fixings. 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.
£4.03
M5 x 16mm socket button screw marine grade 316 ISO 7380 ISO 7380 socket button screw M5 x 16mm A4 marine grade stainless steel, side profile Low-profile button head detail - M5 x 16mm A4 stainless button screw ISO 7380 Simfix product label - 7380A405016PK10-SIM Simfix product label - 7380A405016PK50-SIM
M5 x 16mm socket button screw marine grade 316 ISO 7380 ISO 7380 socket button screw M5 x 16mm A4 marine grade stainless steel, side profile Low-profile button head detail - M5 x 16mm A4 stainless button screw ISO 7380 Simfix product label - 7380A405016PK10-SIM Simfix product label - 7380A405016PK50-SIM

This M5 x 16mm button head socket screw is manufactured to ISO 7380-1 in A4 stainless steel (316 marine grade). ISO 7380-1 specifies a low-profile dome head with an internal hex socket. The wide, shallow head distributes load over a larger bearing area than a standard cap screw of the same thread size, reducing the risk of pull-through in thinner materials. The low profile and smooth dome surface make this the preferred choice for furniture, panel covers, and decorative or visible fixings where a cap screw head would be too prominent.

Typical applications

  • Marine deck hardware, boat fittings, and coastal fabrication
  • Swimming pool surrounds, leisure facilities, and waterside furniture
  • Offshore and saltwater environments needing a low-profile fastener
  • Chemical plant and food processing equipment with hygiene requirements

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

Fastener styleButton head screw with hex socket drive
StandardISO 7380-1
MaterialA4 stainless steel (316)
Property classA4-070
Thread sizeM5
Thread pitch0.8 mm (coarse)
Length16 mm
Head typeButton head socket
Drive typeHex socket (Allen)
Surface finishPlain (no plating)
HS commodity code7318156290
Recommended useMarine

RoHS and REACH compliant.

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