Square Head Machine Bolts

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Manufacturer, Exporter & Supplier of Square Head Machine Bolts

Square Head Machine Bolts

As a premier manufacturer of industrial fastening solutions, GIC Fasteners proudly presents a comprehensive lineup of square head machine bolts meticulously engineered to meet stringent industry standards. Our square head bolts adhere to a range of international specifications including DIN, ASTM, ISO, and BS, ensuring compatibility and reliability across diverse applications. Crafted with precision and expertise, our bolts are synonymous with durability, strength, and performance, making them indispensable in various sectors from construction to manufacturing. GIC Fasteners employs cutting-edge technology and rigorous quality control measures to produce square head machine bolts that exceed expectations, providing customers with peace of mind and confidence in their projects' integrity and stability. Trust GIC Fasteners as your trusted partner for premium-quality square head machine bolts, and experience the difference in precision engineering and exceptional performance.

When it comes to securing heavy machinery and structural components, square head machine bolts are a fundamental component, and at GIC Fasteners, we specialize in providing top-notch solutions for all your fastening needs. Our square head machine bolts are meticulously crafted to exacting standards, ensuring unmatched durability and reliability in diverse industrial applications. Engineered with precision and manufactured from premium materials, our bolts offer exceptional strength, making them the go-to choice for professionals who demand nothing but the best.

At GIC Fasteners, we pride ourselves on delivering superior products backed by expert knowledge and unparalleled customer service. If you’re in search of square head machine bolts that you can trust to withstand the rigors of your operations, look no further. Contact our team at sales@gicfasteners.com today to discuss your requirements and experience the difference that GIC Fasteners can make in optimizing your projects. Trust GIC Fasteners for all your fastening needs, and elevate your projects with confidence and reliability.

Square Head Machine Bolts Specifications

Standard : DIN, ASTM, BS, ISO, JIS, IS, GB, IS 4190 and all other International Standards
Length : 3 mm to 200 mm
Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Threads: : BSF, UNF METRIC, UNC, BSW or as required
Finish : Plain, black, zinc plated (Cr,3+), zinc plated(Cr,6+), hot dipped galvanized, dacromet, nickel plated, cadmium plated, etc.

Square Head Machine Bolts Dimensions

Square Head Machine Bolts Dimensions
Nominal Size or Basic Product Diameter E F G H R L1
Full-Size Body Diameter Width Across Flats Width Across Corners Head Height Radius of Fillet Thread Length
for Bolt Lengths
6 in. and Shorter Over 6 in.
Max Min Basic Max Min Max Min Basic Max Min Max Min Nom Nom
1/4 0.2500 0.260 0.237 3/8 0.375 0.362 0.530 0.498 11/64 0.188 0.156 0.03 0.01 0.750 1.000
5/16 0.3125 0.324 0.298 1/2 0.500 0.484 0.707 0.665 13/64 0.220 0.186 0.03 0.01 0.875 1.125
3/8 0.3750 0.388 0.360 9/16 0.562 0.544 0.795 0.747 1/4 0.268 0.232 0.03 0.01 1.000 1.250
7/16 0.4375 0.452 0.421 5/8 0.625 0.603 0.884 0.828 19/64 0.316 0.278 0.03 0.01 1.125 1.375
1/2 0.5000 0.515 0.482 3/4 0.750 0.725 1.061 0.995 21/64 0.348 0.308 0.03 0.01 1.250 1.500
5/8 0.6250 0.642 0.605 15/16 0.938 0.906 1.326 1.244 27/64 0.444 0.400 0.06 0.02 1.500 1.750
3/4 0.7500 0.768 0.729 1-1/8 1.125 1.088 1.591 1.494 1/2 0.524 0.476 0.06 0.02 1.750 2.000
7/8 0.8750 0.895 0.852 1-5/16 1.312 1.269 1.856 1.742 19/32 0.620 0.568 0.06 0.02 2.000 2.250
1 1.0000 1.022 0.976 1-1/2 1.500 1.450 2.121 1.991 21/32 0.684 0.628 0.09 0.03 2.250 2.500
1-1/8 1.1250 1.149 1.098 1-11/16 1.688 1.631 2.386 2.239 3/4 0.780 0.720 0.09 0.03 2.500 2.750
1-1/4 1.2500 1.277 1.223 1-7/8 1.875 1.812 2.652 2.489 27/32 0.876 0.812 0.09 0.03 2.750 3.000
1-3/8 1.3750 1.404 1.345 2-1/16 2.062 1.994 2.917 2.738 29/32 0.940 0.872 0.09 0.03 3.000 3.250
1-1/2 1.5000 1.531 1.470 2-1/4 2.250 2.175 3.182 2.986 1 1.036 0.964 0.09 0.03 3.250 3.500
See Paras. 3.4,3.5 2.1.2 3.7

Square Head Machine Bolts Standard Thread Lengths

*Bolts shorter and/or smaller than those listed in the table shall have minimum thread lengths in accordance with American National Standard for Square and Hex Bolts and Screws, B18.2.1*
Diameters Bolt length Thread length
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 7/8"
  • 1"
4" up to less than 8" 3"
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 7/8"
  • 1"
  • 1-1/4"
8" up to less than 12" 4"
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 7/8"
  • 1"
  • 1-1/4"
12" and over 6"

Grades of Stainless Steel Square Head Machine Bolts

 
  • Stainless Steel 304 Square Head Machine Bolts
  • Stainless Steel 304L Square Head Machine Bolts
  • Stainless Steel 304H Square Head Machine Bolts
  • Stainless Steel 310 Square Head Machine Bolts
  • Stainless Steel 310S Square Head Machine Bolts
  • Stainless Steel 310H Square Head Machine Bolts
  • Stainless Steel 316 Square Head Machine Bolts
  • Stainless Steel 316L Square Head Machine Bolts
  • Stainless Steel 316Ti Square Head Machine Bolts
  • Stainless Steel 317 Square Head Machine Bolts
  • Stainless Steel 317L Square Head Machine Bolts
  • Stainless Steel 321 Square Head Machine Bolts
  • Stainless Steel 321H Square Head Machine Bolts
  • Stainless Steel 347 Square Head Machine Bolts
  • Stainless Steel 347H Square Head Machine Bolts
  • Stainless Steel 904L Square Head Machine Bolts
  • Stainless Steel 410 Square Head Machine Bolts
  • Stainless Steel 446 Square Head Machine Bolts
  • 17-4 PH Stainless Steel Square Head Machine Bolts
  • SMO 254 Square Head Machine Bolts
  • Alloy 20 Square Head Machine Bolts

Grades of Duplex & Super Duplex Steel Square Head Machine Bolts

  • UNS S32205 Square Head Machine Bolts
  • UNS S31803 Square Head Machine Bolts
  • UNS S32750 Square Head Machine Bolts
  • UNS S32760 Square Head Machine Bolts

Grades of Titanium Square Head Machine Bolts

  • Titanium Grade 2 Square Head Machine Bolts
  • Titanium Grade 5 Square Head Machine Bolts

Grades of Tantalum Square Head Machine Bolts

  • UNS R05200 Square Head Machine Bolts
  • UNS R05252 Square Head Machine Bolts
  • UNS R05255 Square Head Machine Bolts
  • UNS R05400 Square Head Machine Bolts

Grades of Copper Square Head Machine Bolts

  • UNS C11000 Square Head Machine Bolts
  • UNS C10100 Square Head Machine Bolts
  • UNS C10200 Square Head Machine Bolts
  • UNS C12000 Square Head Machine Bolts
  • UNS C12200 Square Head Machine Bolts

Grades of Cupro Nickel Square Head Machine Bolts

  • CuNi 90/10 Square Head Machine Bolts
  • CuNi 70/30 Square Head Machine Bolts

Grades of Brass Carriage Square Head Machine Bolts

  • UNS C21000 Square Head Machine Bolts
  • UNS C22000 Square Head Machine Bolts
  • UNS C22600 Square Head Machine Bolts
  • UNS C23000 Square Head Machine Bolts
  • UNS C24000 Square Head Machine Bolts
  • UNS C26000 Square Head Machine Bolts
  • UNS C26800 Square Head Machine Bolts
  • UNS C27000 Square Head Machine Bolts
  • UNS C27200 Square Head Machine Bolts
  • UNS C28000 Square Head Machine Bolts
  • UNS C33000 Square Head Machine Bolts
  • UNS C33500 Square Head Machine Bolts
  • UNS C34000 Square Head Machine Bolts
  • UNS C34200 Square Head Machine Bolts
  • UNS C35300 Square Head Machine Bolts
  • UNS C35600 Square Head Machine Bolts

Grades of Aluminium Square Head Machine Bolts

  • Aluminium Alloy 1050 Square Head Machine Bolts
  • Aluminium Alloy 1060 Square Head Machine Bolts
  • Aluminium Alloy 1060 Square Head Machine Bolts
  • Aluminium Alloy 1070 Square Head Machine Bolts
  • Aluminium Alloy 1080 Square Head Machine Bolts
  • Aluminium Alloy 1100 Square Head Machine Bolts
  • Aluminium Alloy 1145 Square Head Machine Bolts
  • Aluminium Alloy 2011 Square Head Machine Bolts
  • Aluminium Alloy 2014 Square Head Machine Bolts
  • Aluminium Alloy 2017 Square Head Machine Bolts
  • Aluminium Alloy 2024 Square Head Machine Bolts
  • Aluminium Alloy 2090 Square Head Machine Bolts
  • Aluminium Alloy 3003 Square Head Machine Bolts
  • Aluminium Alloy 5052 Square Head Machine Bolts
  • Aluminium Alloy 5083 Square Head Machine Bolts
  • Aluminium Alloy 6061 Square Head Machine Bolts
  • Aluminium Alloy 6063 Square Head Machine Bolts
  • Aluminium Alloy 6066 Square Head Machine Bolts
  • Aluminium Alloy 6082 Square Head Machine Bolts
  • Aluminium Alloy 7050 Square Head Machine Bolts
  • Aluminium Alloy 7075 Square Head Machine Bolts

Grades of Carbon Steel Square Head Machine Bolts

  • Carbon Steel AISI 1018 Square Head Machine Bolts
  • Carbon Steel AISI 1020 Square Head Machine Bolts
  • Carbon Steel AISI 1040 Square Head Machine Bolts
  • Carbon Steel AISI 1045 Square Head Machine Bolts

Grades of Alloy Steel Square Head Machine Bolts

  • Alloy Steel AISI 4130 Square Head Machine Bolts
  • Alloy Steel AISI 4140 Square Head Machine Bolts
  • Alloy Steel AISI 4340 Square Head Machine Bolts
  • Alloy Steel AISI 8620 Square Head Machine Bolts
  • ASTM A193 Alloy Steel Gr B7 Square Head Machine Bolts
  • ASTM A193 Alloy Steel Gr B7M Square Head Machine Bolts
  • ASTM A320 Alloy Steel Gr L7 Square Head Machine Bolts
  • ASTM A320 Alloy Steel Gr L7M Square Head Machine Bolts
  • ASTM A320 Alloy Steel Gr L43 Square Head Machine Bolts
  • ASTM A194 Alloy Steel Gr 2H Square Head Machine Bolts
  • ASTM A194 Alloy Steel Gr 2HM Square Head Machine Bolts
  • ISO 898-1 Alloy Steel Gr 8.8 Square Head Machine Bolts
  • ISO 898-1 Alloy Steel Gr 10.9 Square Head Machine Bolts
  • ISO 898-1 Alloy Steel Gr 12.9 Square Head Machine Bolts

Grades of Silicon Bronze Square Head Machine Bolts

  • UNS C65100 Square Head Machine Bolts
  • UNS C65500 Square Head Machine Bolts
  • UNS C66100 Square Head Machine Bolts

Grades of Phosphor Bronze Square Head Machine Bolts

  • UNS C51000 Square Head Machine Bolts
  • UNS C51900 Square Head Machine Bolts
  • UNS C52100 Square Head Machine Bolts
  • UNS C54400 Square Head Machine Bolts

Grades of Zirconium Square Head Machine Bolts

  • UNS R60700 Square Head Machine Bolts
  • UNS R60702 Square Head Machine Bolts
  • UNS R60704 Square Head Machine Bolts
  • UNS R60705 Square Head Machine Bolts
  • UNS R60706 Square Head Machine Bolts

Grades of Beryllium Copper Square Head Machine Bolts

  • UNS C17200 Square Head Machine Bolts
  • UNS C17300 Square Head Machine Bolts
  • UNS C17500 Square Head Machine Bolts
  • UNS C17510 Square Head Machine Bolts

Grades of High Tensile Square Head Machine Bolts

  • Grade 8.8 Square Head Machine Bolts
  • Grade 10.9 Square Head Machine Bolts
  • Grade 12.9 Square Head Machine Bolts

Grades of Nimonic Square Head Machine Bolts

  • Nimonic Alloy 75 Square Head Machine Bolts
  • Nimonic Alloy 80a Square Head Machine Bolts
  • Nimonic Alloy 90 Square Head Machine Bolts
  • Nimonic Alloy 105 Square Head Machine Bolts
  • Nimonic Alloy 115 Square Head Machine Bolts
  • Nimonic Alloy 236 Square Head Machine Bolts

Grades of Nitronic Square Head Machine Bolts

  • Nitronic 50 Square Head Machine Bolts
  • Nitronic 60 Square Head Machine Bolts

Characteristics of Square Head Machine Bolts

  • Durability: Square head machine bolts are crafted from high-quality materials, ensuring exceptional durability and resistance to wear and tear, making them ideal for heavy-duty applications.
  • Precision Engineering: These bolts are manufactured with precision, featuring accurate threading and dimensions, ensuring secure and stable connections in various industrial and construction applications.
  • Strength: Square head machine bolts are designed to bear substantial loads, providing reliable fastening solutions for heavy machinery, structural components, and industrial equipment.
  • Corrosion Resistance: Many square head machine bolts are coated with corrosion-resistant materials or made from stainless steel, protecting them from rust and corrosion, ensuring longevity and reliability in challenging environments.
  • Customization: Square head machine bolts can be customized in terms of size, length, threading, and material, allowing for tailored solutions that meet specific project requirements.
  • Ease of Installation: Designed for easy installation, square head machine bolts simplify the assembly process, saving time and effort during construction, repairs, and maintenance projects.
  • Versatility: Square head machine bolts find applications in a wide range of industries, including manufacturing, construction, automotive, and aerospace, showcasing their versatility and reliability in diverse settings.
  • High-Quality Finish: Square head machine bolts are meticulously finished to ensure smooth surfaces and precise threading, enhancing their overall performance and ease of use.

Applications of Square Head Machine Bolts

Industry Specific Applications
Manufacturing Used in heavy machinery assembly, ensuring stable connections for components in manufacturing processes.
Construction Applied in building frames and structural constructions, providing secure fastening for beams, columns, and trusses.
Automotive Utilized in vehicle assembly, securing components in engines, chassis, and suspension systems, ensuring stability in automotive applications.
Aerospace Used in aircraft assembly, providing secure fastening for critical components in airframes and engines, meeting strict safety standards in aerospace engineering.
Marine Applied in shipbuilding, securing various components and structures in marine vessels, ensuring stability and safety at sea.
Oil and Gas Utilized in offshore platforms and refineries, providing robust fastening solutions for heavy equipment and structures in the oil and gas industry.
Telecommunications Used in telecom tower assembly, securing antennas and satellite dishes, ensuring stability and strength in communication infrastructure.
Railway Applied in railway tracks and signaling systems, ensuring secure connections and stability in railway infrastructure.
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Square Head Machine Bolts - FAQs

Square head machine bolts feature a distinctive square-shaped head and are designed for heavy-duty applications requiring high strength and durability. Unlike other bolts, their unique head design allows for easier gripping and torque application.

Square head machine bolts are commonly manufactured from materials such as carbon steel, stainless steel, and alloy steel. The choice of material depends on factors such as the application's environment, load requirements, and corrosion resistance.

Square head machine bolts find extensive use in industries such as construction, agriculture, automotive, and machinery manufacturing. They are preferred for applications requiring secure fastening and structural integrity.

Square head machine bolts are manufactured according to various international standards, including DIN, ASTM, ISO, and BS. These standards ensure uniformity in dimensions, material composition, and mechanical properties.

Choosing the correct size and length of square head machine bolts depends on factors such as the thickness of the materials being fastened, required load-bearing capacity, and assembly requirements. Our experts can assist you in selecting the appropriate bolts for your specific application.

Yes, GIC Fasteners offers customization services for square head machine bolts to accommodate unique project specifications. This includes variations in material, thread type, head size, and surface finishes.

Square head machine bolts offer several advantages, including increased torque transmission, improved resistance to loosening under vibration, enhanced gripping for manual tightening, and simplified maintenance and inspection.

Depending on the material selected, square head machine bolts can exhibit varying degrees of corrosion resistance. Stainless steel and coated bolts are particularly suitable for applications where corrosion is a concern.

Yes, square head machine bolts made from heat-resistant materials such as alloy steel or those with specialized coatings can withstand high-temperature environments commonly found in industrial settings.

Square Head Machine Bolts - Export Destination

Square Head Machine Bolts Suppliers in North America

Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States.

Square Head Machine Bolts Suppliers in South America

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.

Square Head Machine Bolts Suppliers in Europe

Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic (Czechia), Denmark, Estonia, Finland, France, Germany, Greece, Holy See, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom.

Square Head Machine Bolts Suppliers in Asia

Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, Cyprus, Georgia, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Laos, Lebanon, Malaysia, Maldives, Mongolia, Myanmar, Nepal, Oman, Pakistan, Palestine, Philippines, Qatar, Saudi Arabia, Singapore, South Korea, Sri Lanka, State of Palestine, Syria, Taiwan, Tajikistan, Thailand, Timor-Leste, Turkey, Turkmenistan, United Arab Emirates, Uzbekistan, Vietnam, Yemen.

Square Head Machine Bolts Suppliers in Australia

Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.