Black Nickel Plating
Black nickel plating: a matt black decorative finish with 12-48 h protection for visible screws and precision fasteners.
| Finish Code | TZ012 |
|---|---|
| Environmental Grade | REACH / RoHS compliant |
| Salt Spray Standard | 12-48 h; sealing treatment extends protection |
| Appearance / Colour | Matt black |
| Suitable For | Screws requiring a matt black appearance; precision fasteners |
| Features | Decorative black finish; corrosion resistant |
| Environmental Compliance | REACH and RoHS compliant |
Overview
Surface finishing on a fastener is a functional coating, not a cosmetic one: it sets the friction coefficient that determines how much of the applied torque becomes clamp load, and it defines how long the part survives in a corrosive environment. Two finishes that look identical can differ by a factor of several in salt-spray hours and by enough in friction to change the torque specification. This listing: finish code TZ012, salt spray 12-48 h, appearance / colour Matt black, environmental compliance REACH and RoHS compliant.
What sets this listing apart: Features Decorative black finish; Salt Spray Standard 12-48 h.
Advantages
Friction coefficient changes with coating: a zinc-flake coating typically runs lower and more consistently than electroplated zinc, which is why torque tables are finish-specific.
Barrier coatings protect the base metal, while sacrificial coatings protect the steel even at a scratch; the choice depends on whether the joint will be damaged in service.
Hydrogen embrittlement risk separates processes: electroplating on high-strength steel needs a de-embrittlement bake, while mechanical and flake coatings avoid the risk entirely.
Applications
Automotive underhood and body joints, outdoor equipment, marine and coastal installations, electronics hardware, and any joint where the torque specification is tied to a friction value.
Quote the standard, the hours and the acceptance criterion together — a salt-spray figure without the test method is not a specification. Check that the coating process is compatible with the core hardness of the part.
Product information is supplied by Toprecision. Custom parts can be produced to drawing — contact us for samples or a quotation.
Specifications across this series
4 parts in this series
| Part | Finish Code | Environmental Gr… | Salt Spray Stand… | Appearance / Col… |
|---|---|---|---|---|
| Black Nickel · TZ012 / REACH / RoHS compliant / 12-48 h; sealing treatment extends protection | TZ012 | REACH / RoHS compliant | 12-48 h; sealing treatment extends protection | Matt black |
| Chrome Plating (Bright Chrome) · TZ013 / Trivalent chromium decorative plating, RoHS compliant / 48-120 h; increases with nickel layer thickness | TZ013 | Trivalent chromium decorative plating, RoHS compliant | 48-120 h; increases with nickel layer thickness | Mirror-bright chrome |
| Plating () · TZ019 / REACH / RoHS compliant / 24-72 h; longer with increased plating thickness | TZ019 | REACH / RoHS compliant | 24-72 h; longer with increased plating thickness | Bright, mirror-like |
| Zinc plated · TZ020 / Trivalent chromium passivate available. RoHS compliant / 240 h; higher specification available on request | TZ020 | Trivalent chromium passivate available. RoHS compliant | 240 h; higher specification available on request | Matt silver |
Values are taken from each part’s own attribute set. Changing length, material or finish changes pull-out strength and installation torque, so compare the row that matches your drawing.
Selection and test data: engagement length, standards, salt-spray hours
FAQ
What does this finish provide?
Finish Code TZ012, Environmental Grade REACH / RoHS compliant, Salt Spray Standard 12-48 h, Appearance / Colour Matt black.
How does it affect torque and friction?
Carbon Steel.
What should I verify before ordering or installing it?
Quote the standard, the hours and the acceptance criterion together — a salt-spray figure without the test method is not a specification. Check that the coating process is compatible with the core hardness of the part.