Blind threaded inserts provide permanent threads in thin sheet applications with one-sided access

ATLAS SpinTite blind threaded inserts from PennEngineering provide strong, permanent, and reusable threads in thin sheet materials where only one side is accessible for hardware installation. Installation is performed from the accessible ‘front’ side using spin-spin tooling technology.

The inserts then become permanently mounted on the ‘back’ side to accept a mating screw for final component attachment.



The ‘blind’ installation capability especially suits applications such as tubing, extrusions, and others where access to the back side is either limited or non-existent.

These steel, aluminium, brass, or stainless steel inserts ideally replace tapped holes, weld nuts, rivets, self-drilling or tapping screws, and through-bolted applications necessitating loose hardware.

They support close-to-edge applications and can be installed at any stage during the production process (even after assemblies have been painted). In service, the inserts exhibit high thread strength and high torque-out resistance.

ATLAS SpinTite inserts have been designed for use with panels or sheets of any hardness or material (including metal, plastics, and fibreglass) and as thin as .020-in/0.51mm.

They additionally can assemble multiple dissimilar materials during installation, eliminating any need to perform spot welding or other secondary operations, saving time and money during production.

This family of inserts includes half-hex shank low-profile head, rib-wall minimised-profile head, rib-wall low-profile head, thin-wall low-profile head, and swaging low-profile head versions.

A variety of available thread sizes range from #6-32 to 1/2-in-13 and M4 to M12, depending on insert type. Custom inserts also can be engineered to satisfy specific application performance requirements.