Certifications & Approvals

Horst EngineeringQuality Management System

ISO9001:2008 and AS9100 Rev. C

Click here to view our registration certificate (Horst Engineering nd Thread Rolling Inc.)

Click here to view Sterling Machine’s registration certificate.

Registrar: American Systems Registrar, LLC

Calibration Systems

ISO10012:2003 and MIL-STD-45662

Nadcap Accreditation

Sterling Machine is approved for Nonconventional Machining/Electrical Discharge Machining(EDM). Click here to view the certificate.

Military Approvals

United States Department of Defense QSLM approved manufacturer of threaded fasteners.

Click here to view our QSL certification letter

Department of State Registration (DDTC) & Export Licensing

Horst Engineering and Sterling Machine are registered with the United States Department of State Directorate of Trade Controls (DDTC). Click here for our current registration letter. All of the businesses that are affiliates of Horst Engineering, including Sterling Machine, are covered by the main registration. Contact us for questions and country specific export license requests.

Aerospace Customer Major Approvals

  • GE Aviation
  • United Technologies Corporation
    • ASQR-01
  • UTC Aerospace Systems
    • High Strength Fasteners
  • Pratt & Whitney Aircraft
    • LCS
    • PWA 96
  • Pratt & Whitney Canada
  • Sikorsky Aircraft
  • Kaman
    • KPS 547

Customer Specific Approvals

Our Quality Management System meets the requirements for many major customers in a variety of high technology industries. Please contact us for details about specific customer approvals.