Quality inspection for sheet metal and fasteners ensures structural integrity, dimensional accuracy, and compliance with industry standards like ISO 9001 and AS9100.

Sheet Metal Inspection Methods

Inspectors use a combination of visual, dimensional, and specialized tests to identify defects like warping, burrs, or cracks. 

Visual Inspection: The first line of defense, checking for scratches, dents, pitting, and surface irregularities.

Dimensional Verification: Using calipers, micrometers, and height gauges to verify critical tolerances, hole placements, and bend angles.

Coordinate Measuring Machine (CMM): Automated systems for precise 3D measurements of complex geometries.

Non-Destructive Testing (NDT): Includes ultrasonic testing for internal flaws, magnetic particle testing for surface cracks, and dye penetrant for weld quality.

Cupping Test: A specific test to evaluate the durability and ductility of metal sheets. 

Fastener Quality Inspection 

Fasteners are governed by the Fastener Quality Act (FQA), which requires conforming to strict manufacturing specifications. 

Thread Inspection: Gauges check for thread geometry, pitch, and freedom of movement to ensure they aren't damaged or incomplete.

Torque & Push-out Testing:

Torque Test: Measures the maximum torque a fastener can withstand before rotating or loosening.

Push-out Test: Determines the force required to press a fastener out of the sheet metal, verifying installation integrity.

Installation Quality: Visual checks ensure fasteners are flush, correctly seated, and haven't caused surrounding material deformation like cracks or "necking".

Material Certification: Verifying records of conformance (lot numbers, chemistry, grade, and coating thickness) against ASTM standards