Shackles and hooks connect everything else in a lifting system. Because they are small and familiar, they are often overlooked — until one fails.
Shackles
- Legible markings: working load limit, grade and manufacturer’s identification.
- Correct pin for the body, fully engaged, and secured where required.
- No bending, cracks, excessive wear or reduced cross-section.
- No signs of welding or heat damage.
Hooks
- Throat opening within limits — an increase indicates overload.
- No twisting of the hook body out of plane.
- Wear in the bowl or saddle within the manufacturer’s limits.
- Safety latch working and closing fully.
Use them correctly, too
Load shackles in line, avoid side loading the pin, and never tip-load a hook. Correct use matters as much as inspection.
