Fastener Sorting Services
Sorting is a critical secondary operation in fastener manufacturing that ensures only parts meeting exact specifications are shipped to the customer. While cold forming and thread rolling produce fasteners with high accuracy, additional sorting verifies that every part meets the required standards for dimensional tolerance, mechanical properties, and visual appearance. By using a combination of automated and manual techniques, sorting removes defective or out-of-spec parts and delivers consistent, high-quality products.
Roll Sorting
What it is
Roll sorting uses precision-angled rollers to separate parts based on diameter or straightness. Parts that do not meet dimensional tolerances roll off into reject bins while conforming parts continue down the line.
Benefits
- Efficiently identifies oversized or undersized parts
- Ensures consistent diameter tolerances
- High throughput, suitable for large-volume production
Common Applications
- Automotive fasteners where precise fit is critical
- Structural bolts and screws used in safety-critical assemblies
Camera Sorting (Optical Inspection)
What it is
Camera sorting employs high-speed optical equipment with multiple cameras and sensors to inspect fasteners for dimensional accuracy, thread quality, surface defects, and overall geometry.
Benefits
- 100% inspection capability at production speeds
- Detects defects such as missing threads, damaged heads, or incorrect lengths
- Generates inspection data for process control and traceability
Common Applications
- Precision fasteners for automotive safety systems
- Medical device fasteners where flawless quality is mandatory
Eddy Current Inspection
What it is
Eddy current testing uses electromagnetic fields to detect cracks, hardness variations, or material inconsistencies within fasteners. The test is non-destructive and suitable for high-speed inspection.
Benefits
- Identifies subsurface flaws not visible to the eye
- Detects incorrect material hardness or heat treatment conditions
- Enhances safety and reliability of critical fasteners
Common Applications
- Defense hardware
- Automotive drivetrain and engine fasteners
- High-stress industrial machinery components
Hand Inspection
What it is
Skilled inspectors manually review fasteners for cosmetic defects, dimensional accuracy, or specific customer requirements. Hand inspection is often used for small production runs or to double-check automated systems.
Benefits
- Flexible for complex geometries or low-volume parts
- Detects subtle defects not always caught by automated equipment
- Provides an added layer of quality assurance
Common Applications
- Specialty or custom fasteners with unique features
- Prototype or short-run production
- Customer-specific requirements beyond standard inspections
Industries That Rely on Sorting
Sorting ensures consistent quality across industries where reliability is critical, including:
- Automotive – for safety-critical bolts, screws, and clips
- Defense – for zero-defect hardware
- Electronics – for miniature screws in consumer devices
- Medical Devices – for fasteners in surgical instruments and implants
- Industrial Equipment & Energy – for high-stress fasteners exposed to vibration and load
Why Sorting Matters
Sorting operations provide the final safeguard in fastener production, ensuring that only fully compliant, defect-free components reach the customer. By combining high-speed automated inspection with human expertise, sorting reduces risk, prevents assembly failures, and supports the highest levels of product quality.
Why Valley Fastener?
We know that your reputation depends on the quality and tolerances of our products. We have nearly 50 years in business as a supplier for major OEMs across medical device manufacturers, automotive manufacturers, military & defense, the energy sector, and electrical component manufacturers. Valley Fastener is the largest fastener manufacturer in North America and has an international distribution network that allows us to control quality from design through shipping. Let our manufacturing experience guide your product design to ensure you’re getting the most cost-effective solution.
Contact one of our experts today to answer any questions or for a detailed quote.
