Randack Fasteners Americas, Inc. (RFA)

Service is our strength!


Randack Fasteners Americas, Inc. (RFA)
920 Donata Court
Lake Zurich, IL 60047

Phone: +1 (847) 847-1280
E-Mail: office@randack.com

Capabilities and quality

Tower bolts (EN14399), blade connectors, studs, barrel nuts, washers, nacelle bolting, foundation studs. Hot forged fasteners according to standards and customers drawings and specifications in all grades and materials from M6-M100 with all kind of coatings available.
In-house DELTA-MKS® spray coating line.

Specialty fasteners with complete test programs (US, PT, MPI, PMI..) and certifications 3.1/3.2 with rolled threads up to M200. RADOLID protective caps and AS Tech bolt tensioning equipment.

EN ISO 9001:2015 certified

The factories have complete in-house testing facilities.

We offer more than 60 years experience in the production of a full range of specialty and customized fasteners.

Customer references:

Wind Energy

  • Vestas
  • Suzlon
  • GE Wind
  • Gamesa
  • MFG
  • TPI
  • Aeronautica
  • eTa Blades
  • and others


  • Siemens
  • MacDon
  • Alstom
  • Huisman NA
  • SBM
  • FMC
  • Robbins
  • Terex
  • and others

We offer customized logistic and packing solutions for complete sets or kits for wind turbine fasteners as well as stocking programs and just-in-time deliveries for the Americas.