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Fair Wind Fasteners

316/A4 Metric Stainless Steel Acorn / Cap Nuts

316/A4 Metric Stainless Steel Acorn / Cap Nuts

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Our metric acorn nuts, also sometimes referred to as a cap nut, crown hex nut, domed cap nut, or a dome nut give a nicely finished appearance and are a great way to cover otherwise exposed threads. Made to DIN 1587 dimensioonal standards

These are a solid 316 Stainless Steel (A4), passivated alloy, not to be confused with the 18-8, 304SS, or A2 alloys that are commonly sold elsewhere.

The dimensions of our DIN 1587 Standard 316/A4 Stainless Acorn Nuts are below:

Acorn/Cap Nut Dimension Diagram
 Nut Size

Total Height (H)

Width Across the Flats (W)
M3-0.5 6mm 5.5mm
M4-0.7 8mm 7mm
M5-0.8 10mm 8mm
M6-1.0 12mm 10mm
M8-1.25 15mm 13mm
M10-1.5 18mm 16mm
M12-1.75 22mm 18mm
M16-2.0 28mm 24mm
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