Spire Nuts

A spire nut - also known as a spring nut, U-nut, or push-on nut - is a sheet steel fastening clip that pushes onto a bolt, stud, or panel edge and grips by spring tension, providing a quick-assembly threaded connection without the need to hold the nut during installation. At the DIY Hardware Store, our spire nuts are available in the metric sizes used in automotive bodywork, appliance assembly, electronic enclosures, and general sheet metal fabrication where fast assembly is the priority.

A spire nut is shaped from a flat strip of spring steel with a central hole that's slightly smaller than the bolt thread - it clips over the bolt and the spring tension of the stamped teeth grips the thread with enough force for many light-duty applications without tightening with a tool. For higher loads, a nut or spire nut used as an assembly aid is replaced with a conventional nut for the final tightening. They're particularly useful in automotive trim and panel assembly where access to the back face of the panel is impossible once assembled.

  • Push-on spring clip - no need to hold nut during assembly
  • Grips bolt thread by spring tension for quick assembly
  • Ideal where back-face access is impossible once assembled
  • Used in automotive trim, appliances, and electronic enclosures
  • Metric sizes in spring steel
  • Available as singles for fastener matching and repair