Black Stainless Steel Acorn Dome Nut DIN1587 — M3–M12 Decorative Hex Cap

Black stainless steel DIN1587 acorn dome cap nuts provide the protective and decorative function of a standard acorn nut with a professional black finish for dark electronics builds, black anodised aluminium enclosures, and automotive custom builds where silver hardware would be visually inconsistent. The stainless steel base provides corrosion resistance superior to black carbon steel cap nuts.

Key Specifications

Parameter	Value
Material	304 Stainless Steel
Finish	Black (black oxide / passivated)
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
Drive	Hex (spanner / socket)

Why Choose Black Acorn Dome Cap Nuts?

Black finish on 304 SS — professional matte black appearance with corrosion resistance superior to black carbon steel; ideal for dark builds and outdoor use
Dome cap protection — covers sharp exposed bolt ends; prevents injury, cable snagging, and thread corrosion
Decorative finish — smooth black dome provides a clean, premium appearance on visible fastener ends in electronics, automotive, and architectural applications
DIN1587 standard — internationally specified; compatible with all standard metric coarse thread bolts M3–M12
M3–M12 range — covers electronics (M3–M6) through structural and automotive assembly (M8–M12)

Typical Applications

Black anodised aluminium electronics enclosure assembly — covering internal bolt ends
Dark PC case and chassis assembly (M3–M5)
Automotive custom builds with all-black hardware aesthetic (M6–M12)
Motorcycle and e-bike component fastening with black hardware (M6–M10)
Robotics chassis and servo bracket assembly with black hardware (M3–M6)
Architectural and furniture assembly with black hardware finish (M6–M12)

Compatible With

Standard metric coarse thread bolts and studs M3–M12
Black hex socket cap screws and button head screws (matching black hardware set)
Spanner / socket: M3=5.5mm, M4=7mm, M5=8mm, M6=10mm, M8=13mm, M10=17mm, M12=19mm AF

Package Contents

Black DIN1587 acorn dome cap nuts in selected size and quantity (per variant)

Frequently Asked Questions

Q: Is the black finish durable on stainless steel?: A: Black passivated 304 stainless steel provides significantly better corrosion resistance than black oxide carbon steel. The 304 SS base is inherently corrosion-resistant, while the black finish adds aesthetic value. Suitable for indoor electronics and moderate outdoor exposure.
Q: Can I pair these with black hex socket cap screws for a full black hardware set?: A: Yes. These black acorn dome cap nuts are designed to complement black hex socket cap screws, button head screws, and flange lock nuts for a consistent all-black hardware aesthetic.
Q: What is the maximum bolt protrusion that fits inside the dome?: A: Typical dome depth: M3≈4mm, M4≈5mm, M5≈6mm, M6≈7mm, M8≈9mm, M10≈11mm, M12≈13mm. Ensure your bolt protrusion does not exceed the dome depth for correct seating.