DIN934 Black 304 A2-70 Stainless Steel Hex Nut — Metric Thread M1.6–M12

DIN934 black 304 A2-70 stainless steel hex nuts are the standard metric hexagon nut in a professional black finish, combining the corrosion resistance of A2-70 stainless steel with a matte black appearance for dark electronics builds, black anodised aluminium enclosures, and automotive custom assemblies. The DIN934 standard ensures dimensional compatibility with all standard metric bolts, cap screws, and threaded rod.

Key Specifications

Parameter	Value
Material	304 Stainless Steel
Grade	A2-70
Finish	Black (black oxide / passivated)
Standard	DIN934 / ISO 4032
Thread Type	Metric coarse
Size Range	M1.6, M2, M2.5, M3, M4, M5, M6, M8, M10, M12
Drive	Hex (spanner / socket)

Why Choose Black 304 SS DIN934 Hex 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
A2-70 grade — minimum tensile strength 700 MPa; suitable for structural and load-bearing fastening
DIN934 / ISO 4032 standard — internationally specified; compatible with all standard metric coarse thread bolts M1.6–M12
Wide size range M1.6–M12 — covers miniature electronics (M1.6–M2.5) through structural mechanical assembly (M8–M12)
Consistent black hardware set — pairs with black hex socket cap screws, button head screws, and flange lock nuts for a full black hardware aesthetic

Typical Applications

Black anodised aluminium electronics enclosure assembly (M2–M6)
Dark PC case and chassis assembly (M3–M5)
Robotics chassis and servo bracket mounting with black hardware (M3–M6)
3D printer frame assembly with black hardware aesthetic (M3–M5)
Automotive custom builds with all-black hardware (M6–M12)
Miniature electronics and precision instrument assembly (M1.6–M3)

Compatible With

Standard metric coarse thread bolts and cap screws M1.6–M12
Black hex socket cap screws, button head screws, and flange lock nuts (matching black hardware set)
Spanner / socket: M1.6=3.2mm, M2=4mm, M2.5=5mm, M3=5.5mm, M4=7mm, M5=8mm, M6=10mm, M8=13mm, M10=17mm, M12=19mm AF

Package Contents

DIN934 black hex nuts in selected size and quantity (per variant)

Frequently Asked Questions

Q: What is the AF (across flats) size for each nut?: A: M1.6=3.2mm, M2=4mm, M2.5=5mm, M3=5.5mm, M4=7mm, M5=8mm, M6=10mm, M8=13mm, M10=17mm, M12=19mm across flats (AF). These are standard DIN934 dimensions.
Q: Is the black finish on 304 SS more durable than black carbon steel nuts?: A: Yes. Black passivated 304 stainless steel provides significantly better corrosion resistance than black oxide carbon steel. The 304 SS base is inherently corrosion-resistant, while carbon steel relies entirely on the black oxide coating which can chip or wear over time.
Q: Can I use these with standard silver bolts?: A: Yes. DIN934 black hex nuts are dimensionally identical to standard silver hex nuts and are fully compatible with all standard metric bolts regardless of finish. The black finish is purely aesthetic.