Build to Print
Highest Quality

Big Bolt is one of the largest, specialty fastener machine shops in the United States. Our large supply of blanks and bar stock, and a near non-stop manufacturing schedule allow us to get you what you need when you need it—even custom orders. 

  • Non-Standard Parts 
  • Per-Print Orders
  • Gap Buys
  • Low-volume MRO
  • Prototypes
  • Sample Runs
  • Design Verification Builds
  • Service Parts
CNC Machining

CNC Machining

We have 12 programmable CNC machines for engineered fasteners and other close-tolerance work on a production-based schedule. This allows for maximum productivity, even with complex fasteners

  • Prototypes or large volumes 
  • Superior Consistency
  • Milling
  • Drilling
  • Tapping
  • Blueprint Specials
  • Faster Turnaround




Big Bolt has 10 cutting machines capable of taking product from our large inventory of blanks and custom producing a product to your exact length requirements.  From band saws to Disc saws, we can handle sizes from M6 up to 4 inches in diameter.

  • Any size length 

  • No minimum quantity 

  • Break in service available

  • Camber machine to verify straightness  



Drilling is a core competency of Big Bolt and utilized by many customers for those unique, hard to find, custom specialty fastener requirements.  Multiple machines available for a number of key drilling operations.  
  • Gun drilling
  • Cross drilling 
  • Drilled and tapped holes
  • Metric capabilities from M 3.5 to M 76
  • Imperial capabilities #10 to 1 1/2 "   


Big Bolt has perfected forging in any material.  From low carbon and alloy materials to exotic stainless steels.  We have developed a forging process to manufacture cap screws in small diameters and long lengths.  Our on-site equipment is capable of next day manufacturing when needed.  
  • Hot Forging 
  • Capable of any head styles
  • #10 - 2" in diameter
  • Hot forge blanks up to 3 1/2" in diameter 
  • Lengths up to 40" 


When your custom fastener requires milling, you can depend on Big Bolt to get the job done.   Our state of art, on-site, high speed milling machines are capable of producing product to your exacting specification.
  • Multiple machine centers, same day manufacturing 
  • Prototype parts
  • No minimum quantity 
  • Metric from M5 - M76
  • Imperial from 1/4" to 4"
  • No length limitations 

Plating & Heat Treating

Our products meet the most rigorous industry standards.  Should your fastener have to work in extreme conditions and require special hardness, durability, or environmental resistance, we can provide a multitude of different finishes. 
  • Break-ins available
  • Zink clear / yellow / olive 
  • Hot dipped galvanized 
  • Salt spray
  • Trivalent plating  
Secondary Processes_0006

Secondary Processes

Big Bolt specializes in secondary operations related to the custom fastener industry.  We offer a full range of secondary operations that will enable the quickest product turnaround in the specialty fastener industry, and a one stop shopping experience.
  • Cut and chamfer
  • Tapping
  • Cross drilling 
  • Broach
  • Slotting
  • Turning
  • Grooving 
  • Grinding
  • Milling 


At Big Bolt, threading is a core competence.  Whether you need a bolt cut threaded or roll threaded, our one stop shop has you covered.  Featuring single headed rollers and double headed rollers, our experienced staff has you covered across multiple machine centers.  

  • Stocking heat treated blanks for fasted turnaround 
  • Small runs available 
  • Cut and thread for next day shipments available 
  • Metric diameters from M6 to M100
  • Imperial diameters from 1/4" to 4" 
  • Acme thread from #10 to 4" in diameter 

Want to learn more About our capabilities

Our continuous investment in test and measurement equipment ensures our customers get the highest quality fasteners in the shortest amount of time. If you'd like to learn more about our capabilities talk to one of our experts today.