Nuts are available in the full range of threads Metric coarse and fine, American Unc and Unf and British BSW, BSF and BA. Materials include carbon steels, high-grade steels, stainless steels, brass, bronze, aluminium and nylon.

Threaded Nuts

Nuts made from various metals and plastic have a primary function in a threaded assembly to act as the device through which the tension is induced into the bolt or screw and to continue to retain that tension and the clamp load in the assembly. The majority of nuts have hexagon drive faces but they come with a large variety of other features for a secondary purpose such as thread locking, Sealing, load spreading, pinning, welding and capping.

Hexagon Full Nuts

Plain hexagon full nuts are the most commonly used mating part to go with a bolt or a screw. Din 934 is the dominant standard that is similar to a hexagon nut ISO style one. Hexagon high nuts ISO style two are again similar to Din 934 but sizes M10 and above are slightly larger for applications requiring a higher clamp load.

Lock Nuts or Jam N

Locknuts are used in combination with hexagon full nuts, the correct assembly method is to apply the thin nut first then lock the full nut against the lock nut. The two nuts are tightened against each other after assembly to ‘jam’ them together preventing the standard or second nut from loosening and to create thread locking.

Square nuts

Square nuts originally design was to go with square head bolts, they have generally been replaced by the cheaper hexagon nut or the square pressed nut