In 1936, aircraft designer Sir Oliver Simmonds company produced its first collection of aerospace nuts and accessories. Forty years later, Simmonds permanently indented its name on the fastening world by inventing and manufacturing the first ever range of nylon ring self-locking nuts - The Nylstop.

In recent years, Simmonds has continued to develop this expertise and capability in high specification female thread fastener solutions which enables us to make high precision bespoke nuts to meet the specific quality, performance and cost requirements of our customers.