Duplex Nails

A duplex nail is a two-headed nail that was invented in 1916 by William Arthur Collings to replace common nails used in formwork. Before the invention of duplex nails, common nails were widely used in formwork. Today, duplex nails are most commonly used in temporary construction, such as building wooden scaffolding, formwork, or temporary wood braces. The nail is hammered only to the first head leaving a gap with the second so the nail can be easily removed using a hammer.

DesignationLength under lower headApprox. number per lbs.ShankShank diameterHead diameterHead distance
6D1-3/4″156Smooth.113″0.2118″0.25
8D2-1/4″90Smooth.131″0.2813″0.25
10D2-3/4″59Smooth.148″0.3128″0.3125
12D2-7/8″57Smooth.148″0.3125″0.3125
16D3″45Smooth.162″0.3438″0.375
Other nail sizes, point, top and shank modifications are available upon request.

Nail shank types:

  • Smooth

Nail Cutting Point types:

  • Diamond

Nail finishing types:

  • Bright
  • White
  • Yellow
  • Rainbow

Also we can offer nails from low and high carbon or stainless steel.

1100-2200 lbs

big carton box

1 box

on a pallet

50 lbs

small carton box

48 boxes

on a pallet

Nails can be packed in unlabeled carton boxes or carton boxes with our logo.
On request, individually selected logos, texts or other graphics may be printed on the packaging.
Other packaging options are available upon request.