Stainless Steel Acorn Dome Cap Nut M3–M16 304 A2-70 Hexagon Nut DIN1587

Stainless Steel Acorn Dome Cap Nut M3–M16 — 304 A2-70 Hexagon DIN1587

DIN1587 stainless steel acorn dome cap nuts (also called acorn nuts, dome nuts, or blind nuts) cover and protect exposed bolt or stud ends with a smooth, rounded dome that eliminates sharp thread protrusions, prevents corrosion of the exposed thread, and provides a clean decorative finish. The 304 A2-70 stainless steel construction ensures long-term corrosion resistance for indoor and outdoor applications.

Key Specifications

Parameter	Value
Material	304 Stainless Steel
Grade	A2-70
Standard	DIN1587 / ISO 1587
Head Style	Hexagon with dome cap (acorn / blind)
Thread Type	Metric coarse
Size Range	M3, M4, M5, M6, M8, M10, M12, M14, M16
Drive	Hex (spanner / socket)

Why Choose Acorn Dome Cap Nuts?

• Protects exposed bolt ends — dome covers sharp thread protrusions that could cause injury or snag cables and clothing
• Prevents corrosion — seals the exposed bolt end from moisture, preventing rust and thread degradation on the bolt
• Decorative finish — smooth dome provides a clean, professional appearance on visible fastener ends in furniture, equipment, and architectural applications
• 304 A2-70 stainless — corrosion-resistant for indoor and outdoor use; superior to zinc-plated carbon steel cap nuts
• M3–M16 range — covers electronics (M3–M6) through structural and architectural assembly (M10–M16)

Typical Applications

• Electronics enclosure and instrument panel assembly — covering exposed bolt ends inside enclosures
• Furniture and cabinetry assembly — decorative cap on visible bolt ends (table legs, shelf brackets)
• Playground and outdoor equipment — covering sharp bolt ends for safety
• Architectural and glass curtain wall fastening (M8–M16)
• Automotive and motorcycle custom builds — decorative chrome-look stainless cap nuts
• Marine and outdoor equipment — protecting bolt ends from saltwater corrosion

Compatible With

• Standard metric coarse thread bolts and studs M3–M16
• Spanner / socket: M3=5.5mm, M4=7mm, M5=8mm, M6=10mm, M8=13mm, M10=17mm, M12=19mm, M14=22mm, M16=24mm AF
• Threaded rod and all-thread bar M3–M16

Package Contents

• Acorn dome cap nuts in selected size and quantity (per variant)

Frequently Asked Questions

Q: What is the maximum bolt protrusion that fits inside the dome?

A: The internal dome depth varies by size. Typical values: M3≈4mm, M4≈5mm, M5≈6mm, M6≈7mm, M8≈9mm, M10≈11mm, M12≈13mm. Ensure your bolt protrusion does not exceed the dome depth, or the nut will not seat correctly.

Q: Can acorn nuts be used as structural fasteners?

A: Yes. DIN1587 acorn nuts have the same thread engagement and clamping capability as standard hex nuts of the same size and grade. The dome is purely for protection and aesthetics and does not reduce structural performance.

Q: What is the difference between DIN1587 and DIN917?

A: DIN1587 is the standard (tall) acorn nut with a full dome that provides maximum bolt end protection. DIN917 is a low-profile (short) cap nut with a shallower dome. DIN1587 is the more common specification for general use.

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