Allthread (or Studding) is generally fully – threaded bar.

Studs are also referred to as Engineer’s Studs, although it is common for lengths of allthread (or studding) that are cut to
size to be known as Studbolts, whilst a length of bar with a plain portion and threaded ends is generally known as an Engineer’s Stud.

Double-ended Engineer’s Studs of equal thread length are known as Tie-Rods.


Various strength grades

Allthread in Grades 4.6, 8.8 & 10.9

Studbolts in B7, B7M, L7, L7M (& B8 & B8M stainless steels) as used in the petrochemical and offshore industries


Common applications include mating flanged joints together where precise positioning is required


Petrochemical bolting supplied to ASTM specification

Full test certification available


Large range of plating / finishes available for Studbolts, Engineer’s Studs and Allthread. Including:

  • Zinc Plating
  • Sherardizing
  • Galvanising
  • Electroless Nickel Plating
allthread and studbolts