Connecting elements are used when the components in the machine are intended to be fixed firmly to each other. Fixing screws, rivets and studs are discrete elements that are usually detachable and can be reused.

Comprehensive instructional kit of the main nuts and bolts used in engineering.

Standardised designations, terms and specific applications of different thread types, determination of the thread type with the thread gauge.

Thread efficiencies for different pairs of materials and thread pitches.