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Custom Bolts and Fasteners for Engine Manufacturing

Chicago Nut & Bolt is a recognized manufacturer of cold-formed, hot-forged, precision CNC, thread-rolled, and other specially fabricated fasteners for demanding applications in engine manufacturing and across numerous industries. We collaborate with clients to create custom and varied designs, such as asymmetrical parts or big head-to-shank ratio components.

Chicago Nut & Bolt is known for keeping engine manufacturers humming. We deliver ISO-certified products and comply with customers’ special proprietary standards. We can also fulfill orders for custom parts of any size and volume and offer hex cap screws, nuts, studs, washers, and more.


Bolts and fasteners are used in engine manufacturing to assemble automotive machinery, such as automobiles,, and trucks. They are also applied in producing other vehicle parts, including crankshafts, engines, pistons, and more.

At Chicago Nut & Bolt, we produce and obtain custom-made bolts in metric and inch sizes for engine manufacturing and other complex requirements. Our bolts can be made of brass, aluminum, A286, alloy steel, carbon steel, and stainless steel.


Standard guidelines and requirements for the production of bolts and caps are DIN931, DIN933, ISO4017, ISO4014, DIN6921, and DIN921. These specifications guarantee that bolts are produced to exact specifications for various uses.

Moreover, international specifications ISO4017 and ISO4014 apply to bolts with metric threads and hexagonal heads. For hexagon flange bolts, the DIN6921 standard applies, while the DIN921 standard is followed for small hexagon head bolts.

When choosing the appropriate bolts for your engine manufacturing needs, it is important to consider these guidelines. These specifications guarantee that the bolts you choose are of the best quality and will function as expected in various tasks, from delicate applications to projects requiring heavy-duty use.

Chicago Nut & Bolt has and complies with the following standards and certifications:

  • ASTM Standards
  • SAE Standards
  • A2LA Registered – As Compliant with the Fastener Quality Act
  • ISO:9001 2000 Certified
  • Pressure Vessel Certification

Sizes and Surfaces

Using our extensive stock of blanks, we provide fasteners for heavy machinery, military, railroad construction, etc. Our products include specialized bolts, nuts, screws, and more. We work with materials that range in diameter from 1/4″ to 4″ with lengths up to 72″.

Chicago Nut & Bolt’s reputation is based on our ability to meet your specific fastener needs, including extra-large and extra-long sizes. Specifically, custom bolts for engine manufacturing require coatings that prevent corrosion. Thus, we provide the following finish options:

  • Zinc
  • Yellow zinc
  • Phosphate
  • Bright dip
  • Cadmium
  • Chrome
  • Galvanizing
  • Painting
  • Phosphoric acid
  • Black oxide
  • Powder coating
  • Wax
  • Other specialized finishes

Top-Caliber Custom Bolts and Fasteners From Chicago Nut & Bolt

Fasteners with the ability to withstand high-temperature applications are necessary for engine manufacturers. At Chicago Nut & Bolt, we provide specialized hardware constructed from materials and alloys that can endure extreme heat while maintaining stability.

We also provide specialized parts produced from 3:Inconel, A286, and Hastelloy to satisfy engine makers’ industry-specific requirements. As a result, customers like Cummins, Detroit Diesel, Navistar, and MTU Friedrichshafen rely on us to deliver custom components for their projects.

We have the expertise to produce your customized bolts on schedule and accurately! Contact us to learn more about our products and services, or request a quote to start working with Chicago Nut & Bolt today.