We are experts in Special Fasteners, Special Bolts, Special Nuts, Inconel Fasteners...

Product Range

Manufacturing Specials at Bolt King

Bolt King manufactures special bolts and nuts to customer's drawings, or to international standards. We are also enjoy undertaking reverse engineering projects. Our special fasteners are used in safety critical applications throughout the globe, from gas turbines refurbishment projects in Aberdeen, to offshore oil platform installations in the Pacific Ocean, to automotive line-stops in Northern Italy.

Below are some of products we commonly produce, but it is by no means an exhaustive list, as much of our product is manufactured to drawing. Please do not hesitate to contact us, and one of our Project Managers will be back to you quickly.



Our capabilities include:

  • Hex and Socket Products M10 - M56
  • CNC Machined Components M4 - M200

Manufacturing Specials such as:

  • Hex Bolts
  • Hex Flange Bolts
  • Hex Set Screws
  • Stud Bolts
  • Socket Capscrews
  • U-Bolts
  • Hexalobular Screws
  • 12 Point/Ferry Head Capscrews
  • Anchor Bolts
  • Hex Nuts
  • AMSL Nuts
  • Nyloc Nuts
  • Slotted / Castle Nuts
  • Heavy Hex Nuts
  • ENSA type Nuts
  • Philidas type Nuts


Bolts: ANSI B18.2.1, DIN 931,DIN 933, ISO 4014, ISO 4017,BS 1768, BS1768, IFI 115

Nuts: ANSI B18.2.2, DIN 934,ISO 4032, BS1768, BS 1769

Studbolts: DIN 975, DIN 976,BS 4882, ANSI B16.5


Any Thread form, including:

  • Metric
  • Metric Fine
  • Metric Course
  • BSW
  • BSF
  • BA
  • UNF
  • UNC
  • UN8


  • Quenching and Tempering
  • Case Hardening
  • Thru Hardening
  • Precipitation Hardening
  • Solution Annealing
  • Nitriding
  • Normalising


  • Zinc / Zinc Nickel
  • Organic Zinc
  • Deltatone
  • Dacromet
  • Sheradizing
  • PTFE
  • Trivalent Coatings
  • Chrome
  • Hot Dip Galvanising

Special Fasteners In Exotic Alloys, Including
Inconel & Super Duplex