Dome Nuts (DIN 1587)

FULLERKREG DIN 1587 dome nuts (also known as acorn nuts, cap nuts, or blind nuts) combine functional thread protection with a smooth, decorative domed profile. Manufactured to the DIN 1587 standard, the domed cap fully encloses the bolt or stud end, protecting the thread from corrosion, contamination, and mechanical damage while eliminating sharp exposed thread ends for improved safety and aesthetics. Available in stainless steel A2 (SUS304), marine stainless steel A4 (SUS316), and bright zinc-plated carbon steel, covering thread sizes M3 through M20.

Browse by Material & Surface

Dome Nuts (DIN 1587) — Stainless Steel A2 (SUS304), Passivated
SUS304 (A2 / 1.4301) · Passivated · M3–M20 · Good corrosion resistance · General industrial / indoor-outdoor / decorative

Dome Nuts (DIN 1587) — Marine Stainless Steel A4 (SUS316), Passivated
SUS316 (A4 / 1.4401) · Passivated · M3–M20 · Excellent corrosion resistance (Mo-bearing) · Marine / chemical / food-grade / coastal architecture

Dome Nuts (DIN 1587) — Bright Zinc Plated Carbon Steel (Class 4)
Q195 low carbon steel · Bright zinc plated (BZP) · M3–M20 · Good corrosion resistance (≥72h salt spray) · Furniture / automotive / construction / general industrial

Selection Guide

Standard Notes

DIN 1587 specifies hexagonal cap nuts with a domed (acorn-shaped) top that fully encloses the end of the mating bolt or stud. The dome provides three key functions: thread protection (sealing the thread end from moisture, chemicals, and contamination), safety (eliminating sharp exposed thread ends), and aesthetics (delivering a clean, finished appearance in visible fastening locations). The hexagonal body is compatible with standard spanners and sockets.

• Standard: DIN 1587 — Hexagon cap nuts (dome / acorn style)
• Also known as: Acorn Nut, Cap Nut, Blind Nut, Crown Nut, Domed Hex Nut
• Thread: Metric coarse, right-hand, tolerance class 6H
• Equivalent / related: ISO 8483, ASME B18.2.2 (inch acorn nut)
• Typical uses: Furniture hardware, bicycle components, automotive trim, architectural railings, marine fittings, electrical enclosures, any application requiring a finished, safe, and corrosion-protected thread end

Product Gallery

DIN 1587 Dome Cap Nuts — actual product photos:

Why FULLERKREG

• 🏭 Factory Direct — Full in-house manufacturing and surface treatment; no middlemen
• 📐 DIN 1587 Compliant — Dome profile and all dimensions verified against the standard
• 🎨 Decorative & Functional — Clean domed finish for visible fastening locations; protects threads and eliminates sharp ends
• 🔬 Material Certified — Mill test certificates (MTC) available for all grades
• 📦 Bulk Wholesale — Competitive MOQ; consistent lot quality for production lines
• 🚢 Global Export — Shipped worldwide with full export documentation
• 💬 Technical Support — Engineering team available for specification and sourcing guidance