An extensive range of non-preferred, difficult to source, forged special bolts that may require CNC machining to provide complex dimensional shape.

All types of Heat Treatment and Surface Finishes are undertaken to ensure that we offer the most comprehensive range of bolting.

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Leading U.K. Manufacturer of Metric & Imperial - BSW (Whitworth), BSF, UNC, UNF Bolts & Nuts

Smith Bullough manufacture a wide range of special Bolts and industrial fasteners. We manufacture bolts in most head types including Hexagon Head, Square Head, Cup Square, Cup Round, Csk Square, Csk Round, Cup Nib & Csk Nib.

hex head, cup head and countersunk blanks
smith bullough bolts and screws manufacturer machined and forged industrial fasteners

We offer an extensive range of standard & special fasteners in an array of threadforms (Metric, BSW (Whitworth), BSF, UNC & UNF) and finishes.

Our range of manufacture includes :

  • Hexagon Headed Bolts
  • Square Head Bolts
  • Cup Square Hexagon & Cup Round Hexagon
  • Cup Nib Bolts & Csk Nib Bolts
  • Csk Square Bolts / Ploughbolts
  • Square Square Hexagon / Holding Down Bolts
  • Indented Foundation Bolts
  • Ajax Bolts & Pyramid Bolts
  • T Bolts
  • Petrochemical Bolts, Nuts, Studbolts in L7, L7M, B8, B8M
  • Allthread & Engineers Studs
  • Special Head shapes manufactured to customer specification

Our range is available from stock or blanks for rapid delivery.

Materials - Steel, Stainless & Exotics

Smith Bullough manufacture fasteners in most materials, including:

  • Carbon Steel - Grades 4.6 - 14.9; R, S, T, V; SAE8
  • Stainless Steel - A2, A4, B8/M
  • Super Duplex - UNS S31254, S32750, S32760
  • Exotic Alloys - Hastelloy, Monel, Inconel, Nitronic, Titanium, 660
  • Non-Ferrous - Hiduron, Cupro Nickel, Aluminium, Phosphor Bronze, Copper

Metric and Imperial Special Bolting

Smith Bullough stock and manufacture industrial fasteners in Metric, UNF, UNC, BSF & BSW (Whitworth) threadforms.

Sizes range from M6 (1/2") to M52 (2") Diameter. Length < 900mm (36").

Surface Finishes

A wide array of finishes available including Self Colour, Zinc Plated, Galvanised, Sherardized, Dacromet & Geomet.

special fasteners