Nylon Sutures The clear package with black ink writings contains "Nylon Sutures Synthetic Silkworm Gut No. 1, 100 Strands,” made by “Fannin & Co. Ltd, 41 Grafton St., Dublin.” It also states that these sutures are “14’ Non-Absorbable, Boilable, Do not use Phenols.” Nylon sutures are commonly used in both internal and external surgical procedures where long-term tissue support is required. They are also boilable, which allows for sterilization before use. However, it is important to avoid using phenols with these sutures as they can degrade the nylon material. 1925-1975