CNC Machining Bolts

Custom Carbon Steel CNC Machining Bolts
Custom Carbon Steel CNC Machining Bolts

In the vast realm of industrial manufacturing, the precision, quality, and customization of CNC machining bolts play a crucial role in various sectors. Among the leaders in this niche industry, Able Hardware, a professional custom CNC machining bolts manufacturer based in worldwide biggest city – Suzhou, China, has carved a significant reputation for its distinctive blend of technological prowess and adherence to stringent quality standards. We will shed light on the intricate processes, quality assurance measures, and custom solutions offered by Able Hardware, serving as a glimpse into the intricate world of precision manufacturing.

Key Takeaways

  • Bolt designs vary depending on the application and influence the machining technologies used.
  • Material selection, such as stainless steel, brass, and titanium, affects CNC machining parameters.
  • Advanced CNC lathes and milling machines are used for intricate bolt designs.
  • Able Hardware is a top-notch bolt manufacturer in China, offering custom solutions tailored to each client’s specifications.
Custom CNC Machining Bolts & Nuts
Custom CNC Machining Bolts & Nuts

Understanding CNC Machining Bolts

To fully grasp the concept of CNC machining bolts, it is imperative to delve into the intricacies of its manufacturing process, understanding its design, materials used, and the specific CNC machinery involved. Bolt designs are a critical element in the manufacturing process. They vary significantly, depending on the application, ranging from simple hexagonal heads to complex, custom-made designs. The design directly influences the machining technologies employed, with certain designs requiring advanced CNC machinery for precise and accurate production.

CNC Machining Bolts Manufacturing Machines
CNC Machining Bolts Manufacturing Machines

The materials used in the manufacturing process also play a crucial role. Most bolts are made from robust materials like stainless steel, brass, or titanium to ensure durability and resistance to external factors. The selection of the material directly affects the CNC machining parameters, such as cutting speed, feed rate, and tool path.

The specific CNC machinery involved is selected based on the complexity of the bolt design and the material used. Advanced CNC lathes and milling machines are typically employed in the production of intricate bolt designs. These machines offer enhanced precision, reliability, and repeatability, ensuring high-quality bolt production. Understanding these factors provides a comprehensive view of CNC machining bolts.

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CNC Machining Bolts Application

CNC machining is commonly used in the production of bolts due to its precision and efficiency. CNC machining allows for the accurate and consistent manufacturing of bolts with complex shapes and tight tolerances. Here are some common applications of CNC machining in the production of bolts:

1. Standard bolts: CNC machining is used to produce a wide range of standard bolts, including hex bolts, socket head cap screws, carriage bolts, and more. CNC machines can accurately cut threads, drill holes, and shape the bolt heads according to the required specifications.

2. Custom bolts: CNC machining enables the production of custom bolts tailored to specific applications. This includes bolts with unique head shapes, non-standard thread pitches, or special features such as flanges or shoulder bolts. CNC machines can efficiently create these customized designs.

3. High-strength bolts: CNC machining is often used to manufacture high-strength bolts, such as those used in structural applications or heavy machinery. CNC machines can handle tough materials like alloy steels and titanium, allowing for the production of bolts with exceptional strength and durability.

4. Aerospace and automotive bolts: CNC machining is widely employed in the production of bolts used in the aerospace and automotive industries. These industries demand bolts with precise dimensions, high strength, and reliable performance. CNC machines ensure the required quality and consistency for such critical applications.

5. Specialty bolts: CNC machining is utilized for producing specialty bolts used in specific industries or applications. This includes bolts for marine, oil and gas, construction, and other sectors that require bolts with unique features, corrosion resistance, or specific certifications.

CNC machining offers versatility and efficiency in the production of bolts, allowing for the creation of various types and sizes with consistent quality. It ensures that bolts meet the required specifications and performance standards for their intended applications.

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CNC Machining Bolts Tolerance

The tolerance requirements for CNC machining bolts can vary depending on the specific application and industry standards. Tolerances refer to the allowable deviation from the desired dimensions of a part. Here are some common tolerance considerations for CNC machining bolts:

1. Diameter tolerance: This refers to the allowable deviation in the bolt’s diameter. It ensures that the bolt fits properly into the corresponding hole or nut. Typical diameter tolerances for CNC machined bolts range from +/- 0.005 to 0.01 inches (0.13 to 0.25 mm).

2. Length tolerance: This specifies the acceptable deviation in the bolt’s overall length. It ensures that the bolt is the correct length for its intended application. Length tolerances for CNC machined bolts can range from +/- 0.01 to 0.05 inches (0.25 to 1.27 mm).

3. Thread tolerance: This relates to the allowable deviation in the thread dimensions, including pitch, major diameter, and minor diameter. It ensures proper engagement with mating threads. Thread tolerances for CNC machined bolts typically adhere to standard thread specifications, such as ANSI B1.1 or ISO 965.

4. Head dimensions tolerance: This specifies the acceptable deviation in the dimensions of the bolt head, such as the head height, head diameter, or head width for hex bolts or socket head cap screws. Head dimension tolerances for CNC machined bolts can range from +/- 0.01 to 0.02 inches (0.25 to 0.5 mm).

5. Surface finish: CNC machining can achieve various surface finishes for bolts, such as smooth, textured, or knurled surfaces. The surface finish tolerance depends on the specific requirements of the application and can range from Ra 16 to Ra 125 microinches (0.4 to 3.2 micrometers).

It is important to note that these tolerance values are general guidelines and may vary based on the specific requirements of the bolt design, application, and industry standards. It is recommended to consult the appropriate standards or work with a CNC machining expert to determine the specific tolerance requirements for your bolts.

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CNC Machining Bolts Materials

Able Hardware chooses international standard materials for their bolts, such as steel, aluminum, brass, and titanium below. These materials are known for their strength, durability, and resistance to external factors. The selection of the material is crucial as it directly affects the CNC machining parameters.

Custom Titanium Alloy CNC Machining Bolts
Custom Titanium Alloy CNC Machining Bolts

Stainless Steel

  • 304
  • 304L
  • 310S
  • 316
  • 316L
  • 321
  • A42205(Duplex Stainless Steel)
  • 6672507(Duplex Stainless Steel)
  • 904L(Super austenitic stainless steel)


  • 6061


  • H62
  • H59


  • Hastelloy C-276

Titanium alloy

  • TA1
  • TC4

Die Steel

  • D2-80

Carbon Steel

  • 667/700
  • 1008
  • 1022
  • 10B21
  • 35K
  • 38K
  • 45K
  • Q195
  • Q235
  • 35#
  • 45#
  • ML40Cr
  • 10B33
  • A3
  • 10B29
  • 1035K
  • 1045K
  • ML25B
  • 20MnTiB/10B33
  • 45#/ML25B
  • 10B26
  • 10B21/45K
  • 10B21/10B26
  • 35K/10B21
  • 45#/35K
  • 45K/40Cr

Alloy Steel

  • 40Cr
  • B7
  • 20MnTiB
  • SCM435
  • 35CrMo
  • 35vb
  • SCM440
  • 42CrMo
  • 35CrMoA
  • 40Cr/SCM435


  • A66
  • PP
  • PVC
  • PC
  • PPS
  • PVDF
  • PA66+30% glass fiber
  • PA66+50% glass fiber

The Strength Grade/Class of CNC machined bolts

The grade of bolts refers to the strength and mechanical properties of the bolts. It is usually indicated by a combination of numbers and letters. The most commonly used grading system for bolts is the SAE (Society of Automotive Engineers) grading system, which uses numbers to indicate the strength level of the bolts.

CNC Machining Bolts Milling Machine
CNC Machining Bolts Milling Machine

For example, Grade 8 bolts have a higher strength compared to Grade 5 bolts. The specific properties and requirements for each grade may vary depending on the standard or specification being followed.

It’s important to note that different industries and countries may have their own grading systems or standards for bolts. Therefore, it is recommended to refer to the relevant standards or consult with an expert to determine the appropriate grade of bolts for a specific application.

Able hardware custom for various grade bolts below:

  • 4.8 grade
  • 6.8 Grade
  • 8.8S
  • 8.8 Grade
  • 10.9S
  • 10.9 Grade
  • 12.9 Grade
  • 44-70
  • 310S
  • A2
  • A2-50
  • A2-70
  • A2-80
  • A3
  • A3-50
  • A3-70
  • A4-50
  • A4-70
  • A4-80
  • B8M
  • D2-80
  • D6
  • F593C
  • F593D
  • F593G
  • F593H
  • U.S. Grade 2
  • U.S. Grade 5
  • U.S. Grade 8
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The Dimensions of CNC Machine Bolts

The dimensions of bolts typically include the following parameters:

1. Diameter: This refers to the major diameter of the bolt, which is the measurement across the widest part of the bolt’s threads. It is commonly denoted in inches or millimeters.

2. Length: This indicates the overall length of the bolt, typically measured from the underside of the bolt head to the end of the shank. It is usually specified in inches or millimeters.

3. Thread pitch: This refers to the distance between the threads of the bolt, measured in threads per inch (TPI) or millimeters per thread (mm/turn). It determines the number of threads per unit of length.

4. Head type: Bolts can have various head types, such as hexagonal (hex head), socket head, or countersunk head. The head type determines the shape and style of the bolt’s head.

5. Drive type: This refers to the type of tool or driver required to tighten or loosen the bolt, such as a hex key (Allen wrench), socket wrench, or screwdriver.

6. Thread length: This indicates the length of the threaded portion of the bolt. It is typically measured from the underside of the head to the end of the threads.

7. Thread diameter: This refers to the minor diameter of the bolt, which is the measurement across the smallest part of the bolt’s threads. It is commonly denoted in inches or millimeters.

Custom Alloy Steel CNC Machining Bolts
Custom Alloy Steel CNC Machining Bolts

These dimensions can vary depending on the specific type, standard, and application of the bolt. It is important to refer to the appropriate standards or specifications to ensure the correct selection and use of bolts for a particular project.

Able Hardware manufactures custom bolts with specific diameters and lengths below:


  • M2
  • M2.5
  • M3
  • M4
  • M5
  • M6
  • M6-0.75
  • M7
  • M8
  • M8-1
  • M10
  • M10-1
  • M10-1.25
  • M12
  • M12-1.25
  • M12-1.5
  • M14
  • M14-1.5
  • M16
  • M16-1.5
  • M18
  • M18-1.5
  • M18-2
  • M20
  • M20-1.5
  • M20-2
  • M22
  • M22-1.5
  • M22-2
  • M24
  • M24-1.5
  • M24-2
  • M27
  • M27-1.5
  • M27-2
  • M30
  • M30-1.5
  • M30-2
  • M30-3
  • M33
  • M33-2
  • M33-3
  • M36
  • M36-2
  • M36-3
  • M39
  • M39-3
  • M42
  • M42-2
  • M42-3
  • M45
  • M48
  • M48-3
  • M52
  • M52-3
  • M56
  • M56-4
  • M64
  • M64-4
  • 1/4-20
  • 1/4-28
  • 5/16-18
  • 3/8-16
  • 5/16-24
  • 3/8-24
  • 7/16-14
  • 7/16-20
  • 1/2-12
  • 1/2-13
  • 1/2-20
  • 9/16-12
  • 5/8-11
  • 5/8-18
  • 3/4-10
  • 3/4-16
  • 7/8-9
  • 1-1/8-12
  • 1-1/8-7
  • 1-1/4-7
  • 1-1/2-6
  • 1″-8
  • 2″-4.5

Length(mm or inch)

  • 5
  • 6
  • 1/4
  • 7
  • 8
  • 3/8
  • 10
  • 12
  • 1/2
  • 13
  • 14
  • 15
  • 5/8
  • 16
  • 17
  • 18
  • 3/4
  • 20
  • 22
  • 7/8
  • 24
  • 25
  • 1
  • 1″
  • 27
  • 28
  • 1-1/8
  • 30
  • 30.00
  • 1-3/16
  • 32
  • 33
  • 1-3/8
  • 35
  • 38
  • 1-1/2
  • 1-1/4
  • 40
  • 1-5/8
  • 42
  • 43
  • 1-3/4
  • 45
  • 1-7/8
  • 48
  • 50
  • 2″
  • 51
  • 55
  • 57
  • 2-1/4
  • 60
  • 2-3/8
  • 62
  • 63
  • 2-1/2
  • 65
  • 2-3/4
  • 70
  • 72
  • 75
  • 76
  • 3″
  • 77
  • 78
  • 3-1/8
  • 80
  • 3-1/4
  • 85
  • 3-3/8
  • 3-1/2
  • 89
  • 90
  • 92
  • 3-5/8
  • 95
  • 3-3/4
  • 98
  • 3-7/8
  • 100
  • 4″
  • 102
  • 103
  • 105
  • 4-1/4
  • 108
  • 110
  • 114
  • 4-1/2
  • 4-5/8
  • 120
  • 4-3/4
  • 125
  • 5″
  • 130
  • 133
  • 5-1/4
  • 135
  • 5-1/2
  • 140
  • 145
  • 5-3/4
  • 150
  • 6″
  • 155
  • 6-1/4
  • 159
  • 160
  • 165
  • 6-1/2
  • 168
  • 170
  • 6-3/4
  • 175
  • 7″
  • 180
  • 7-1/4
  • 185
  • 190
  • 7-1/2
  • 195
  • 7-3/4
  • 200
  • 8″
  • 205
  • 8-1/4
  • 210
  • 215
  • 8-1/2
  • 219
  • 220
  • 8-3/4
  • 225
  • 9″
  • 230
  • 9-1/4
  • 235
  • 240
  • 9-1/2
  • 245
  • 9-3/4
  • 250
  • 10″
  • 260
  • 10-1/2
  • 270
  • 275
  • 11″
  • 280
  • 290
  • 11-1/2
  • 295
  • 300
  • 12″
  • 310
  • 12-1/2
  • 320
  • 330
  • 13″
  • 340
  • 13-1/2
  • 350
  • 14″
  • 360
  • 14-1/2
  • 370
  • 375
  • 380
  • 15″
  • 390
  • 15-1/2
  • 400
  • 16″
  • 410
  • 16-1/2
  • 420
  • 430
  • 440
  • 450
  • 460
  • 470
  • 480
  • 490
  • 500
  • 520
  • 580
  • 600
  • 700
  • 800
  • 900
  • 1000
  • 1100
  • 1150
  • 1200
  • 1250
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Custom Bolts Surface Treatment

Surface treatment is a crucial step in the manufacturing process of CNC machined bolts. It involves applying a protective or decorative coating to the surface of the bolts to enhance their appearance, improve corrosion resistance, and increase durability.

Able Hardware offers a wide range of surface treatment options for their CNC machined bolts below:

  • Whitewash
  • blackening
  • Blue White Zinc
  • Waxing
  • Dacromet
  • Dacromet 500A
  • Black Zinc
  • Nickel Free
  • Colored Zinc
  • Hardened
  • Hot-dip galvanized
  • Colored zinc(trivalent)
  • Chrome Plating
  • White zinc
  • Blackening
  • Phosphating
  • Zinc-nickel alloy natural color
  • Gray phosphating
  • Pickling yellow
  • Tinned natural color
  • White nickel coated with oil
  • Blackening+glueing
  • Silver plate
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CNC Machined Bolts Manufacturing Process

Having dissected the general process of CNC machining bolts, we now turn our focus to the specific procedures employed by Able Hardware, a premier manufacturer in China. Emphasizing on material selection and Production Efficiency, the company has streamlined its manufacturing process to deliver high-quality bolts and fasteners. 

Custom CNC Machining Bolts Manufacturing Workshop


Once the materials are selected, Able Hardware employs advanced CNC machines for accurate and precise machining of bolts. The use of cutting-edge technology and software ensures consistency and high tolerance levels in the production process.

Production Equipment

Able Hardware utilizes a wide range of production equipment below, These machines are equipped with advanced features and capabilities to handle various bolt designs and materials.

  • CNC Automatic Lathe
  • Auto-Lathes
  • CNC Machining Center
  • Auto-milling machine
  • Drilling and Milling Center
  • Drilling Machines
  • Laser Engraving Machine
  • Grinder Machines
  • Tapping Machine
  • Carving Machine

Quality Control and Packaging:

The finished products are then put through a comprehensive quality control process. Any defects are rectified, and the products are packaged for shipment.

QC Testing Equipment

In addition to its focus on material selection and production efficiency, Able Hardware places great importance on quality control. They have invested in advanced testing equipment to ensure that their CNC machined bolts meet the highest standards of performance and durability.

Some of the testing equipment utilized by Able Hardware includes:

  • KEYENCE Image Dimension Measuring System
  • KMS 2D measures Projector
  • Height Gage
  • Coordinate Measuring Machine
  • Hardness Tester
  • Video Measuring Machine
  • Salt Spray Tester
  • Slide caliper
  • Micrometer


1) Inner packing: Plastic/paper wrap, bubble bag, PE foam, EPE cotton, PP bag, etc.

2) Outer packing: carton box, wooden case, plate, etc.

3) Per the customer’s requirement

Through meticulous planning and execution, Able Hardware has managed to optimize its production efficiency, ensuring the delivery of high-quality bolts to its global clientele. This approach has solidified their standing as a top-notch bolt manufacturer in the competitive worldwide market.

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Quality Assurance and Standards

Ensuring stringent adherence to international quality standards, Able Hardware implements robust quality assurance protocols throughout its manufacturing process. A series of comprehensive inspection protocols are executed at every stage, from raw material procurement to final product delivery, guaranteeing the superior quality of each CNC machining bolt produced.

These inspection protocols involve rigorous and meticulous examinations of the physical properties, dimensions, and performance attributes of the bolts. Precision tools, including micrometers, calipers, and gauges, are used for these inspections. Special attention is given to the dimensional accuracy, surface finish, and mechanical strength, ensuring that the bolts meet the exact specifications of the customers.

The importance of certification cannot be overstated in the CNC machining industry. Certifications are not just mere documents; they are a testament to a company’s commitment to quality, consistency, and continuous improvement. Able Hardware holds several relevant certifications, such as ISO 9001 and ISO/TS 16949, which underlines their adherence to global quality standards. These certifications serve as a guarantee to their clients that every bolt produced is of the highest quality, thereby fostering trust and confidence in their products and services.

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Custom Solutions at Able Hardware

Recognizing the diverse needs of its clients, Able Hardware consistently offers custom CNC machining solutions tailored to meet specific project requirements and industrial standards. They are committed to delivering precision-manufactured components with an emphasis on Material Selection and Design Flexibility.

Able Hardware’s comprehensive approach to customization includes:

Material Selection: They offer a range of materials to suit varying project needs, from stainless steel and aluminum to brass and titanium. This ensures optimal performance and longevity of the machined bolts. 

Design Flexibility: With advanced CNC technology, Able Hardware can create complex and intricate designs that meet specific project requirements. This allows clients to realize their design concepts with precision and accuracy.

 Custom CNC Machining Bolts Design
Custom CNC Machining Bolts Design

Customized Production Process: The production process is tailored to each client’s specifications, optimizing efficiency and quality control.

Able Hardware’s custom solutions are not only about meeting the immediate project requirements. They also focus on future-proofing the client’s operations. By offering a wide choice of materials and flexible design options, they ensure the client’s machined bolts can adapt to evolving industry standards and technological advancements. Thus, Able Hardware stays ahead of the curve, cementing its position as a leading custom CNC machining bolt manufacturer in China.

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Why Choose Able Hardware?

Building on the robust customization capabilities, the decision to choose Able Hardware is further bolstered by their unwavering commitment to quality, technological prowess, and customer-centric approach.

With a rich company history spanning over two decades, Able Hardware has consistently demonstrated its ability to adapt and evolve with the changing technological landscape. They have not only kept pace with the advancements but have also been pioneers in integrating advanced technology into their manufacturing processes. This has manifested in the form of superior precision, improved efficiency, and a wider range of customization options in their CNC machining bolts.

The use of advanced technology extends beyond their manufacturing machinery. The company’s quality assurance methods employ sophisticated, automated systems to guarantee that every product meets the highest quality standards. This technological sophistication is complemented by a team of highly skilled technicians with deep industry knowledge and experience.

Beyond this, Able Hardware prioritizes customer satisfaction. They offer comprehensive customer support, providing detailed product information, addressing queries promptly, and ensuring the delivery of orders on schedule.

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FAQ: Custom CNC Machined Bolts

What Are the Shipping Methods and Delivery Timelines for Able Hardware’s CNC Machined Bolts?

Able Hardware offers various shipping methods for CNC machined bolts, ensuring expedient delivery. Packaging protocols are strictly followed, and order tracking is provided for customer convenience. Specific delivery timelines depend on the chosen shipping method and destination.

Does Able Hardware Offer Any Warranty or After-Sale Services for Their CNC Machined Bolts?

Able Hardware provides a comprehensive warranty for its CNC machined bolts, emphasizing quality assurance and product durability. They also offer robust after-sale services, ensuring customer satisfaction and product reliability post-purchase.

What Is the Pricing Strategy Followed by Able Hardware for Their Custom CNC Machined Bolts?

Able Hardware follows a competitive pricing strategy for its custom CNC machined bolts, prioritizing bolt durability and quality assurance. Pricing reflects the high-grade materials used, precision machining process, and comprehensive after-sale services provided.

Does Able Hardware Have Any Environmental Sustainability Practices in Their Manufacturing Processes?

Able Hardware implements environmental sustainability practices by using eco-friendly materials in their production. They also manage waste efficiently, ensuring minimal environmental impact during the manufacturing of their custom CNC machined bolts.

Can Able Hardware Handle Bulk Orders for Custom CNC Machined Bolts and What Is Their Capacity?

Yes, Able Hardware can manage bulk orders for custom CNC machined bolts. Their capacity is determined by material selection and rigorous quality control, ensuring high-volume production without compromising on precision or quality.


Custom CNC Machining Bolts Nuts from Able Hardware
Custom CNC Machining Bolts Nuts from Able Hardware

In conclusion, Able Hardware exemplifies its industry leadership through its advanced CNC machining process, stringent quality standards, and customizable solutions. Their years of expertise in bolt manufacturing not only ensure premium product quality but also customer satisfaction. Their commitment to innovative techniques and standards is a testament to their status as a trusted CNC machining bolts manufacturer in China.

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