bigHead®

Clarendon Specialty Fasteners are an approved distributor of bigHead® fasteners.

bigHead® embedded and surface bonding fasteners are ideally used to create a secure fixing point on a component.

There are two ranges available; the core range consists of male or female fixings that are available with small, medium and large Heads,
in materials carbon steel or 316 stainless steel and makes choosing your fastener simple. 

The extended range offers various other styles of fixings, if the core range is not suitable.

What are bigHeads®?

Embedded and surface bonding fasteners.

bigHead® fasteners offer a fixing like a threaded collar, stud, nut or pin is welded to a perforated head and are ideal for creating a secure fixing point on a component. 

Its unique design enables a plastic or composite component to be fastened securely with no holes, no punching or drilling. The bigHead® can be installed after the manufacture of the parent component, “post-process”, or during the manufacture, “co-process”.

The fixing point enables the component to be efficiently fastened within an assembly or combined with secondary fastening elements.

bigHead Bonding fasteners for composites

Core Range

Key Benefits

  • Create secure fastening points with no drilling, punching, clamping or riveting
  • Reliably join mixed materials and thicknesses
  • Single-sided access
  • No witness on the ‘A’ surface
  • Flexible installation and assembly options
  • Installation, assembly and performance guidelines

Male bigHeads

M1 Series - Small


Fixing

Male Threaded Stud Carbon Steel or 316 Stainless Steel

Head

Small - B20 Round Head, Ø 20mm

Materials

Carbon Steel BZP or 316 Stainless Steel

M1 Series - Medium


Fixing

Male Threaded Stud Carbon Steel or 316 Stainless Steel

Head

Medium - B30 Round Head, Ø 30mm

Materials

Carbon Steel BZP or 316 Stainless Steel

M1 Series - Large


Fixing

Male Threaded Stud Carbon Steel or 316 Stainless Steel

Head

Large - B38A Rounded Corner Head, Ø 38mm

Materials

Carbon Steel BZP or 316 Stainless Steel

Female bigHeads

F2 Series - Small


Fixing

Female Threaded Collar Carbon Steel or 316 Stainless Steel

Head

Small - B20 Round Head, Ø 20mm

Materials

Carbon Steel BZP or 316 Stainless Steel

F2 Series - Medium


Fixing

Female Threaded Collar Carbon Steel or 316 Stainless Steel

Head

Medium - B30 Round Head, Ø 30mm

Materials

Carbon Steel BZP or 316 Stainless Steel

F2 Series - Large


Fixing

Female Threaded Collar Carbon Steel or 316 Stainless Steel

Head

Large - B38A Rounded Corner Head, Ø 38mm

Materials

Carbon Steel BZP or 316 Stainless Steel

Extended Range

The extended range offers fixings and heads to meet your design needs if the Core Range doesn't suit your application.

Male Threaded Stud


Female Threaded Collar
(sighted or blind)


Female Threaded Nut
(sighted or blind)


3mm Diameter Nail


4.75mm Diameter Plain Pin


45 Degree 12.25mm Loop


90 Degree Loop


90 Degree Hook


Cable Tyrap


45 Degree 19mm Loop