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ELFB Taper Form Bolt


The ELFB taper bolt is used to firmly attach a nVent LENTON taper-threaded coupler onto formwork in precast and cast-in-place construction. This reusable form saving accessory allows forms to be pre-drilled with the correct spacing of the reinforcing steel, which speeds construction and allows the forms to be re-used on repetitive construction elements. This system can be used in conjunction with coupler boxes to eliminate the use of bend-out-boxes and also helps eliminate protruding dowel bars. The screw-in bolt is designed to keep dirt, water and concrete slurry out of the coupler during the concrete pour. The bolt eliminates the need for form saving plates and simplifies the use of standard couplers in form saving applications.​


  • Multiple lengths available depending on form thickness
  • Used in both form saving and coupler box applications
  • Bar end protector included to protect the nVent LENTON taper thread
  • Durable, re-usable and long lasting
  • Saves time and money


Part Number ELFB14X040
Material Steel
Nut Included Yes
Form Thickness (FT) 0.13" – 1.50"
Rebar Size, Metric 14 mm
Length (L) 3.35"
Outer Diameter (OD) 0.63"
Socket Width (SW) 15/16"
Unit Weight 0.4 lb
Number of Washers 1
Standard Packaging Quantity 25 pc
UPC 78285688837
Length dimension is for reference only.
Sizes not shown may be available by special order. Contact your nVent LENTON representative for more information.

nVent, nVent CADDY, nVent ERICO, nVent ERIFLEX, and nVent LENTON are owned by nVent or its global affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without prior notice.


Instruction Sheets