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Quality Control
Whenever you require independent testing of connections and fasteners, you can make use of our laboratory service.
Test & Validation
Want to see how we verify product performance and consistency?
Precision Testing Instruments
·Torque Tester
·Vickers Hardness Tester
·Rockwell Hardness Tester
·Salt Spray Tester
·Film Thickness Gauge
·Profile Projector
·Hydrogen Embrittlement Tester
·Height Gauge
·Gloss Tester
·Environmental Test Chamber
·Rivet Joint Tester
·Shear Plate Tester
·Concentricity Tester
Optical Sorting
Optical sorting is applied to eliminate hidden risks within large batches. Full inspection allows detection of defects that may not be visible during sampling, such as slight deformation, thread inconsistency, surface damage, or dimensional variation.
Sorting standards are set around real assembly conditions, not only nominal tolerances, so parts with potential interference or instability can be filtered out before shipment. This approach improves batch reliability and reduces downstream issues in automated assembly and end use.
Vickers Hardness Testing
Vickers hardness testing supports hardness evaluation on critical local areas of fasteners and precision parts.
The method is suitable for checking surface layers, cross sections, and other small zones that require more precise measurement. Results help assess heat treatment condition, hardening depth, and material consistency, while also revealing risks such as under-hardening, over-hardening, or unstable batch performance.
Section analysis
Metallographic section preparation is used to reveal the true internal condition of metal parts. Clean and controlled cutting allows accurate observation of grain structure, material flow, and internal defects without introducing distortion.
This supports evaluation of heat treatment results, detection of cracks or porosity, and identification of issues such as decarburisation or structural inconsistency.
For fasteners and precision parts, section analysis helps verify whether the internal condition matches the required strength, durability, and process stability.
Coating Thickness Measurement
Coating thickness is verified to balance corrosion protection and functional fit. Excessive buildup can affect thread engagement and torque behaviour, while insufficient thickness may lead to early corrosion.
Measurement is therefore focused on critical functional areas rather than only surface averages. This helps identify coating inconsistency, uneven distribution, and potential assembly risks before parts enter production use.
Salt Spray Testing
Our internal laboratory conducts salt spray testing under controlled conditions, with clear criteria for coating breakdown, red rust onset, and surface integrity.
For applications involving dissimilar materials, additional evaluation can be carried out to assess contact corrosion behaviour under accelerated conditions. So we can identify coating compatibility risks early and support more reliable joint performance in real use.
Quality Control
for Fit, Function, and Consistency
In custom fastener production, quality is not only about passing inspection.
It is about controlling the features that directly affect installation, fit, torque, alignment, coating performance, and long term consistency.
Dimensional Control
Critical diameters, lengths, shoulder positions, concentricity, and step relations are checked according to drawing requirements and process capability.
Thread & Fit Verification
Thread quality is verified with gauges and practical fit requirements, so parts can be assembled smoothly in real use.
Surface & Finish Control
We monitor plating, appearance, burr condition, and surface finish where these factors affect fit, corrosion resistance, or visual quality.
Batch Consistency
We focus on repeatability across batches, because a qualified sample is not enough if mass production cannot stay stable.