IN-HOUSE TESTING
IN HOUSE TESTING LAB
Fasteners Unlimited has been manufacturing and distributing high-quality parts to meet thousands of standards for many years. Within our facility, you’ll find a fully equipped testing lab and warehouse, where certified professionals verify material properties and dimensional accuracy for every part we produce.
We stand behind our certifications — and our name — with complete confidence.
Below are just a few examples of our in-house capabilities at Fasteners Unlimited.
OPTICAL COMPARATOR -
Our lab is equipped with an optical comparator — a precision instrument that uses the principles of optics to inspect and verify part geometry. This tool allows our team to examine fine details such as thread root radius and ensure every part is manufactured exactly to print. It’s an essential asset for both inspection and in-process verification during manufacturing.
MAGNETIC PARTICLE -
Fasteners Unlimited frequently performs magnetic particle inspections (MPI) to meet certification requirements. This non-destructive testing (NDT) method detects cracks, seams, and other surface or near-surface flaws in ferromagnetic materials.
Our facility includes a dedicated MPI station operated by certified technicians. In addition to inspecting our own manufactured parts, we also provide MPI services for customers who require independent testing — all backed by our corporate certification and commitment to quality.
ROCKWELL HARDNESS TESTING
Hardness is a material characteristic defined by its resistance to indentation, determined by measuring the permanent depth of the impression. It is not a fundamental physical property, but an important indicator of material performance.
At Fasteners Unlimited, hardness testing plays a critical role in both our inspection and machining processes. This testing allows us to confirm that materials are suitable before machining begins and provides accurate hardness values after manufacturing — ensuring every part meets specification.
Surface finish -
Surface finish — also known as surface texture or surface topography — describes the nature of a surface as defined by three key characteristics: lay, roughness, and waviness. It represents the small local deviations from a true plane.
Surface finish is especially critical in high-tolerance machined parts. Accurate measurement and verification ensure that surfaces meet engineering requirements and that each component performs as intended in its final application.
TENSILE TESTING
Tensile testing, also known as tension testing, is a fundamental materials science test in which a sample is subjected to controlled tension until failure. This process determines the ultimate tensile strength of the material and provides valuable data about its mechanical properties.
It is one of the simplest and most widely used mechanical tests, performed using both wedge and axial methods. We also conduct high-temperature environmental testing to evaluate how heat affects material performance. By measuring the force required to bring a specimen to its breaking point, engineers and design teams can accurately predict how materials and finished parts will behave in their intended applications.
marking -
At Fasteners Unlimited, we perform in-house etching and partner closely with a trusted specialist for electrochemical etching. In certain industries, physically altering the material through stamping or mechanical marking is not permitted — making electrochemical etching the ideal solution.
This process provides permanent, precise identification without compromising the integrity or surface finish of the part.