The only perceptible wear in any part was caused by two joint pins rubbing against adjacent parts.

To join tubes end-to-end joint pins (also called spigots) or sleeve couplers are used.

The defect in the Pulqui II was traced to faulty workmanship related to welding the joint pin that fastened the wing to the fuselage.

Serious corrosion of these jointing pins over many decades had caused the granite to split in places, which meant there had been a danger of the columns collapsing as result of the formation of cracks and fissures.

Scans are also dangerous for people with metal objects implanted in their bodies that could be dislodged or disrupted by the magnetic field, such as cardiac pacemakers, joint pins, surgical metal clips, artificial heart valves, an intrauterine device, metal fragments or shrapnel, or any other electronic or metal implants.