Sems-fasteners are fasteners with a captive washer under the head. The washer is typically round and flat, but we can in principle offer any outer shape and geometry a customer wish.

Thread forming screws are screws that creates the female metric thread in a round hole during assembly – thereby reducing the need of tapping the female thread. Bulten offer thread forming screws in sizes M4 to M16.

Miniature fasteners are precision screws and inserts for a variety of host materials.

Screws for plastics are screws that form their own thread in plastic components in a similar way as thread forming screws.

Inserts for plastics are nuts and bolts for injection-molded parts. Once installed they are a permanent part of the plastic assembly.

Compression limiters are used to protect plastic components in assemblies where threaded fasteners generate a high compressive load

Self-aligning screws are screws with a tip that helps to align the fastener during assembly and reduce cross threading.

A patch is a pre-applied, dry-to-touch thread feature added on the fastener either as a dot or as a layer wrapping completely around it. Patches are there to create locking, sealing or anti-seize features.

Many different kind of patches can be applied, e.g. nylon and micro-encapsulated patches.

Weld fasteners are fasteners designed for projection welding onto sheet sections of the intended application. The weld position can be in the shape of isolated points or an annular weld ring.

Clinch type fasteners are press-in fasteners that are installed into a round hole. Upon installation they become a permanent part of the mating assembly.

Flangeform® is a captive fastener system for thin sheet metals.

All metal locking fasteners are fasteners with a (metal) thread feature that provide a secondary locking solution – in addition to the normal thread friction – to prevent unintended back-off.

Special automotive fasteners are fastener types that are typically found predominately within automotive applications. These are typically tailor made products made to customer specifications.

Plugs are normally used to seal draining holes in engine applications.

This category cover some of our very own developments - special and functional solutions developed to solve customer issues.

This category cover products that we produce via cold forming (and possible added machining) which are not necessarily traditional fasteners. These products often pushes the limits to what can be achieved via cold forging – and not seldom we can achieve material savings as well as cost savings by our cold forging process.

Bulten can produce a number of customized fastener solutions.

Bulten can offer a wide range of female fasteners.