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BUMAX are a specialist manufacturer of high strength fasteners in stainless steel materials.

BUMAX stainless steel fasteners are available in a high strength range equivalent to 8.8, 10.9, 12.9 up to and even in excess of 17.9.  Material range from A4/316L, duplex, super-duplex, plus several other grades of stainless steel.

The unique products created by BUMAX are the result of experience gained from a long history in stainless steel and fastener manufacturing.  Based in Sweden, BUMAX is located in a region well known for its production of high quality stainless steel.  BUMAX is a subsidiary of Sweden’s Bufab Group, which gives the company significant market reach in order to support its customers across the globe.

BUMAX fasteners are designed for extreme environments meeting the requirements of high demanding customers and applications.  BUMAX fastener solutions guarantee high performance, safety and reliability. When it comes to strength, fatigue, corrosion resistance, magnetic permeability and temperature resistance- there is no one better.  All our fasteners are produced with full European traceability and are available with both material certificates and BUMAX 3.1 certificates for complete assurance (3.2 certification available with advance notice).

BUMAX work constantly to find the best innovative fastener solutions in cooperation with our customers.  We have an extensive standard stock range of high strength fasteners available off the shelf.  In many cases, we work with the engineering functions of our customers, offering technical guidance early on during the design stages of projects to help with material selection and ensure correct connection design.

Thanks to BUMAX’s expertise in fasteners and material science many unique and extraordinary fasteners have been designed and manufactured for a variety of critical applications.  BUMAX fasteners offer a reliable option for many critical high stress applications and can even provide a robust alternative to coated high tensile carbon steel bolts in certain applications.


Current application examples of BUMAX include:-

  • Armoured Vehicles
  • Submarines
  • Ships
  • Satellites
  • Fighter Jets
  • Rockets
  • Rifles
  • Sonar Systems
  • Marine Propellers and Jet Propulsion Systems


Stainless Steel Material Range

  • A4/316L in strength 8.8 and 10.9
  • Duplex in strength 12.9
  • Super-duplex in strength 10.9 and 12.9
  • Nimonic 80A
  • Super-austenitic
  • Precipitation hardened martensitic stainless steel


Fastener Types

  • ISO 4014- part threaded hex head bolt
  • ISO 4017- fully threaded hex head screw/bolt
  • ISO 10642- counter sunk socket head screw
  • ISO 1460- pan head screws and self-tapping screws
  • ISO 4032- nuts
  • ISO 7089- washers
  • DIN standards
  • UNC Metric sizes
  • BUMAX Lock Nuts
  • Special designs manufactured to order

Company Criteria

Region: Worldwide,

Category: Fasteners,

Contact Details


Unit 49,
The Washford Industrial Estate,,
B98 0EA