Custom fasteners are specialized hardware components manufactured to meet specific requirements, such as unique dimensions, thread patterns, or materials. They can be designed to meet strength, durability, or corrosion resistance specification and can often improve the performance and longevity of the end product.
They are extremely valuable in the manufacturing industry as they provide a solution for unique or challenging projects where standard fasteners are unsuitable. Furthermore, they reduce assembly time and costs, as they are designed to fit perfectly into the intended application.
Custom fasteners can also increase safety as they can be designed to meet safety standards and regulations in the specific industry. This can be especially important for the aerospace, defense, and medical equipment industries.
At Chicago Nut & Bolt, we supply custom fasteners and package them according to the requested size, weight, container, and labeling requirements. Thus, we can help facilitate integration with your inventory and handling systems.
Every step of our process — from special head marking to custom plating — adheres to strict controls to ensure product quality and integrity. As a result, we deliver high-quality products at all times.
Chicago Nut & Bolt is EDI-capable, providing a fully integrated, dock-to-stock supply! Once we receive your fax or email containing the specification of fasteners, pricing and delivery details are dispatched within minutes. The custom fastener deliveries can be made according to your scheduling or laydown needs — be it 24 hours or seven to ten days. We can also warehouse the parts, then ship them to your location when requested.
Utilizing our massive inventory of blanks, we supply fasteners inclusive of custom bolts, nuts, and screws. We also work with sizes from ¼ in. to 4 in. in diameter and lengths up to 72 in.
Chicago Nut & Bolt is equipped and skilled to provide for our customer’s needs when they need it. We provide aluminum, copper, brass, carbon steel, alloy steel, stainless steel, and A286 materials for customized fasteners. We can also alter the oversized and undersized heads and the length, width, threads, and tolerances.
Chicago Nut & Bolt has produced and supplied specialized fasteners for various sectors. These include agriculture equipment, military and defense, marine, railroad/locomotive, mining, construction equipment, and engine manufacturing.
Our company supports all processes to make and stock your custom-engineered fasteners by supplying components, including multi-blow/die cold-formed specialties and parts with secondary operations.
Fastener Machining Capabilities
With a focus on precision and efficiency, we have the tools and expertise to deliver top-quality results. Here are some of our key machining services:
CNC Machining (Milling/Turning)
Tight tolerance machining per blueprint specifications is essential for achieving high precision in parts and components. Our facility uses state-of-the-art CNC milling and turning machines to produce high-quality parts according to our client’s specifications. We also pride ourselves on delivering exceptional quality and meeting the tightest tolerances.
We can provide precise, accurate drilling for fasteners of various sizes and materials. Our drilling services can accommodate high-volume production runs and tight tolerance requirements, ensuring that each fastener meets the exact specifications for your application.
High-quality custom fastener manufacturers use specialized knurling machines that can work on different shapes and sizes. It makes it possible to create knurled patterns on even the most complex components.
Tapping is a machining process used in fastener-making to create internal screw threads in a hole drilled, reamed, or bored.
Thread grinding produces precise, high-quality threads on fasteners. The process involves using a specialized grinding machine to cut and shape the thread form on a fastener’s surface.
This technique uses hardened dies to press material into a thread form, resulting in a fastener with a precise, uniform thread pattern. Unlike thread cutting or grinding, thread rolling does not remove any material, making it a more efficient and cost-effective method of producing threaded fasteners.
Custom Fasteners by Chicago Nut & Bolt
Chicago Nut & Bolt is compliant with the Fastener Quality Act, and ISO: 9001 2015 certified. Thus, you can count on us to meet all the chemical and physical certifications you require!
We test our fasteners using sophisticated equipment, including a state-of-the-art computerized system, which produces digitally certified tensile and yield tests in accordance with ASTM requirements.
Custom Made Fasteners Capabilities
Low or Medium Carbon Steel
Medium Carbon Alloy Steel
Medium Carbon Steel, Q & T
|Part Diameter (Imperial)
|1/4 to 4 in
|Part Diameter (Metric)
|M6 to M18
|Maximum Part Length
|Up to 72 in
|Metric Blank Diameter
|M6 x 300 through M64 x 500
Flat Head Socket Screw
Hex Cap Screw
Socket Head Cap Screw
|Standard Thread Pitches
8 - Thread Series (8UN)
Coarse Thread Series (UNC/UNRC)
Fine Thread Series (UNF/UNRF)
|Thread Tap Bolt Grades
B70 to B100
C31 to C39
Different Head Styles
Special Body Diameter
Special Extra-Large / Extra-Long Fasteners
|Value Added Services
Bin Stocking Programs
Package to Order
Warehousing- EDI Capable, Fully Integrated Dock-to-Stock Supply
|ASTM Standards Met
|SAE Standards Met
SAE J429 Grade 1
SAE J429 Grade 2
SAE J429 Grade 5
|Quality Control Certifications
A2LA Registered - As Compliant with the Fastener Quality Act
ISO:9001 2000 Certified
Lloyd's Register System
Lloyd's Register Production
Pressure Vessel Certification
|Hydraulic Universal Testing Machine with computer-based, automated, closed loop digital servo control and data acquisition system.
|Design Software Used
|1 piece to 10 million pieces
|Acceptable File Formats
|If you are seeking a supplier for your mining fasteners and other custom fastener services, look no further than Chicago Nut & Bolt. It takes 50 of these 3-pound bolts to secure the electric engine inside each eight-foot wheel of Komatsu Haulpak off-highway trucks. Manufactured in Peoria, Illinois, these mammoth 300-ton dump trucks are the workhorse of mining industry operations across the nation. Chicago Nut & Bolt keeps wheels turning as the manufacturer of choice for more than a dozen Haulpak mining fasteners and custom parts. It had tried traditional distributors before, but by going direct, Komatsu realized the cost savings and coordinated delivery schedules it was looking for in a single-source Custom Fastener Manufacturer and supplier.
|Heavy Machinery Fasteners
|A leading manufacturer of railroad locomotives, GE Transportation Systems makes quality a priority. So when the company asked its vendors if they had what it takes to be a world-class supplier, Chicago Nut & Bolt rose to the challenge. Today, we manufacture all heavy machinery fasteners and other Custom Fasteners for GE Transportation Systems according to Six Sigma specifications, the company's own quality program that goes above and beyond industry standards. We manufacture these heavy machinery fasteners in yearly quantities, inventory them on our shelves and provide a seamless supply based on electronically transmitted weekly schedules.
|Military and Firearms Fasteners
|Chicago Nut & Bolt also manufactures military fasteners. We work with military contractors on a variety of projects which called for custom fasteners to be used. Only the highest quality materials and precise manufacturing processes could be used to achieve the level of craftsmanship the military requires for all components of vehicles in use. Chicago Nut & Bolt is ready and willing to provide their expertise and services to help assist in the design and development of components utilizing custom made military fasteners.
|If you need railroad fasteners from a reliable supplier, you can look to us. A leading manufacturer of railroad locomotives, GE Transportation Systems makes quality a priority. So when the company asked its vendors if they had what it takes to be a world-class supplier, Chicago Nut & Bolt was a natural. Today, we manufacture all railroad fasteners Custom Fasteners for GE Transportation Systems according to Six Sigma specifications, the company's own quality program that goes above and beyond industry standards. We manufacture railway fasteners and other products in yearly quantities, inventory them on our shelves and provide a seamless supply based on electronically transmitted weekly schedules.
|Agriculture and Farming Equipment Fasteners
|If you are looking for agricultural fasteners, look no further than Chicago Nut & Bolt, As a leading manufacturer of agricultural equipment, DM1 does its share to ensure that America's breadbasket stays full. High demand for DMI's revolutionary new tillage system requires extraordinary service from its vendors. Chicago Nut & Bolt delivers with an uninterrupted supply of 40 different custom agricultural fasteners. Every Monday, we receive an MRP schedule for all the custom parts DM1 will need for the next six months, a schedule that changes weekly. Our internal systems ensure that the right agricultural fasteners and other parts arrive at DM1 on time, every time.