A Culture of Quality

Our Inspection Process

Shipping millions of parts per year requires a rigorous and multifaceted approach to inspection.

Our process dictates that we check a high percentage of parts, but this quality-focused mindset is what allows us to consistently deliver your precise parts on schedule. 

We pride ourselves on having excellent measuring tools throughout the shop. All of our measuring tools and gauges are calibrated on a regular schedule by an independent ISO-certified vendor. We also internally verify the accuracy of these tools against a known standard every day before we start production or measure a part.

We inspect all materials upon receipt. These inspections include visual checks, dimensional checks, and verification of the material certification. Cast and forged materials are inspected on our CMMs to verify the as-cast features meet your requirements.

Before production can begin, our inspectors verify a First Article to ensure it meets every dimension and every note on your drawing. These inspections are fully documented and reports are always available upon request.

At HTT, we emphasize quality over quantity because we know only a stable process leads to high production. Our well-trained operators are constantly checking your parts while they work to ensure dimensions are centered within the tolerance range. We have microscopes at every workstation because, at HTT, high-quality surface finishes and burr-free edge conditions are just as important as dimensional correctness. 

Once manufacturing starts, each shift’s output is segregated and independently verified by a member of our inspection team using a 1.0 AQL statistical sampling plan. We take this even further by requiring this step be performed by a different inspector using their own tools.

When HTT sends parts out for third-party operations such as heat-treating or plating, our inspectors verify these operations meet the requirements and have appropriate certifications. We hold our vendors to a high standard: we visually check for consistency under magnification and verify all dimensions meet your specifications. 

Before your parts are shipped, we perform one final check to ensure they are clean, the finishes are consistent, and the documentation and certifications are all in order and compliant to your specifications. 

We’re used to working in regulated industries, so record keeping and traceability are part of our DNA. For every part that goes through our shop, we record who performed the work, who inspected it, and when they did it. All of our inspection data and certifications are kept indefinitely, backed up in our secure digital archive.