Geomet 321 Coated Fasteners

Stud Bolts, Nuts, Screws, Threaded Rod & Washers

GEOMET® 321 is applied to protect fasteners and many type of metallic parts from corrosion and is used in many industries. It can be combined with PLUS®, DACROLUB® or GEOKOTE® topcoats to provide a very broad range of friction coefficients. It is the most widely used product in zinc flake technology.

  • Thin dry-film, non-electrolytic
  • Water-based chemistry
  • Passivated zinc and aluminium flakes in a binder, patented chemistry
  • Chrome free alternative to DACROMET® 320
  • Metallic silver appearance

Application process

GEOMET® 321 can be applied by Dip-Spin, Spray, Dip-Drain-Spin using bulk or rack

Health and Safety

  • Aqueous dispersion
  • Complies with REACh
  • Complies with the 2000/53/CE and 2002/95/CE directives

GEOMET 321 Characterictics & Performance

  • The coefficient of friction can be adjusted to targeted values ranging from 0.06 to 0.20 (ISO 16047) with NOF METAL COATING GROUP’s selected topcoats
  • It can be used with or without topcoat
  • No hydrogen embrittlement
  • Excellent assembly and multi-tightening behavior (with lubricated topcoat)
  • Good mechanical damage (test method D24 1312, USCAR 32) and chemical (test VDA 621-412) resistance
  • Performance maintained at elevated temperatures (up to 300°C)
  • Paintable coating
  • Electrical conductivity for most application processes
  • Bimetallic compatibility with aluminum

GEOMET 321 Corrosion Resistance

Coating Weight Salt Spray Test (IS0 9227/ASTM B117) Cyclic Test
24 g/m2 240 hours without white rust  
720 hours without red rust
24 g/m2 + topcoat 720 hours without red rust 4 cycles ACT
60 cycles GMW 14872
60 cycles SAE J2334
36 g/m2 1000 hours without red rust
    Results may vary depending on substrate, geometry of parts and type of application processes

GEOMET 321 Specifications

  • BMW (GS 90010)
  • CHRYSLER (PS-5873, PS-9666)
  • DAIMLER (DBL 9440)
  • FIAT (Capitolato 9.57513)
  • FORD (S438)
  • IVECO (18-1101)
  • PORSCHE (PN 11011)
  • RENAULT (01-71-002)
  • RENAULT Trucks (01-71-4002)
  • VOLVO Cars (VCS 5737,29)
  • ALSTOM (DTRF 150213)
  • KNORR BREMSE (N12005)