When using webbing fittings as part of a synthetic sling, OSHA states the following:
- Materials are compatible with the mechanical and environmental requirements of the sling,
- Fittings have a rated load at least the same as the synthetic webbing sling,
- Fittings have sufficient strength to sustain twice the rated load of the sling without visible permanent deformation, and
- Surfaces are clean, and sharp edges are removed.