U bolt terminology explained

A U-bolt is a round bar in the shape of the letter U with a metric screw thread at both ends.

U-bolts have primarily been used to support pipework through which fluids and gasses pass. As such, U-bolts are traditionally measured using pipe-work engineering speak, i.e. nominal Bore, which relates to the internal diameter of the pipe it is supporting.

U bolts can also be used in a variety of other applications particularly in building and construction U Bolts are especially useful in a vertical application, clamping timber or sheet to an upright post. Square U bolts can be used to clamp to square or rectangular box section.

At Speedy Fixings, we supply a large collection of U bolts for sale, including zinc plated u bolts, galvanised u bolts, stainless steel u bolts and galvanised u bolts with backing plates. Our U bolts come complete with nuts and are available in standard sizes, from M6 to M16. If you require non-standard sizes, contact our team.

Some of our best-selling U bolts include M12 stainless u bolts with nuts and M12 galvanised u bolts with nuts. These bolts have several size variations to suit different pipe sizes.

There are six things to consider when selecting a U bolt:

  1. Material type: mild steel, stainless steel
  2. Material finish: zinc plated, galvanised
  3. Thread size: These are commonly a metric coarse thread
  4. Inside leg length: Extended leg (or long leg) are available
  5. Nominal bore: This term relates to the internal diameter of a pipe. The external diameter may vary, therefore it is best to check the ‘between legs’ distance when ordering.
  6. Thread centres: This may be important if the U bolt has to fit into pre-drilled holes or through a backing plate

Square base and V base U bolts are also available.

For more information about our products or advice on how to choose the right U bolt for your applications, please contact us today, or call us on 01206 793100 to speak to a member of our team.