Square Head Bolts

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Manufacturer, Exporter & Supplier of Square Head Bolts

Square Head Bolts

Welcome to GIC Fasteners, where we pride ourselves on crafting top-quality square head bolts that meet rigorous industry standards. As specialists in manufacturing, we ensure that our square head bolts adhere to various specifications including DIN, ASTM, ISO, BS standards, and international equivalents. What sets us apart is our unwavering dedication to excellence, guaranteeing that each bolt is meticulously engineered to offer unmatched performance and reliability across a diverse range of applications. Whether you're in construction, machinery, or other industrial sectors, we have the expertise to meet your specific needs with customized fastening solutions. Trust GIC Fasteners for high-quality square head bolts crafted with precision and backed by our commitment to delivering excellence.

Are you in need of sturdy square head bolts to reinforce your projects? Look no further than GIC Fasteners. Our square head bolts are meticulously crafted to meet stringent quality standards, ensuring they provide robust and reliable fastening solutions for your needs. Whether you’re tackling construction projects, machinery installations, or any other application, our bolts are engineered to deliver outstanding performance and durability.

At GIC Fasteners, we recognize the importance of finding the perfect fit for your requirements. That’s why we offer customized options to ensure you get precisely what you need. Ready to enhance the strength and security of your projects? Reach out to our team at sales@gicfasteners.com today for personalized assistance and competitive pricing. Let GIC Fasteners be your trusted partner in securing your projects with top-quality square head bolts that you can count on.

Square Head 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.
Forming : Hot & Cold Forged
Variants : Fully Threaded Square Head Bolts, Partial Threaded Square Head Bolts, Metric Square Head Bolts, Imperial Square Head Bolts
Coatings : PTFE (Teflon), Hot Dip Galvanizing, Aluminum Zinc Flake, Zinc Phosphating, Manganese Phosphating, Metallic Zinc, Nickel Bolts Plating, Chrome Plating, Cadmium Plating, Silver Plating, Tin Plating

Square Head Bolts Dimension Chart

Square Head Bolts Diagram

Nominal or Basic Product Diameter

Diameter of Full Size Body (B) Width Across Flats (W) Width Across Corners (C) Head Height (H) Radius of Fillet (R) Thread Length for Bolt Lengths  
Max Min Max  Min Sharp Max Min  Max Min  Max Min (Basic) 6 in. & Shorter (Basic) over 6 in. (Basic)
1/4 .2500 .260  .237 .375  .362  .530  .498  .188  .156  0.03  0.01 .750   1.000
5/16 .3125  .324  .298  .500  .484  .707  .665  .220  .186  0.03  0.01  .875  1.125 
 3/8 .3750  .388  .360  .562  .544  .795  .747  .268  .232  0.03  0.01  1.000  1.250 
7/16 .4375 .452  .421  .625  .603  .884  .828  .316  .278  0.03  0.01  1.125  1.375 
1/2 .5000 .515  .482  .750  .725  1.061  .995  .348  .308  0.03  0.01  1.250  1.500 
5/8 .6250  .642  .605  .938  .906  1.326  1.244  .444  .400  0.06  0.02  1.500  1.750 
3/4 .7500  .768  .729  1.125  1.088  1.591  1.494  .524  .476  0.06  0.02  1.750  2.000 
7/8 .8750  .895  .852  1.312  1.269  1.856  1.742  .620  .568  0.06  0.02  2.000  2.250 
1 1.0000 1.022  .976  1.500  1.450  2.121  1.991  .684  .628  0.09  0.03  2.250  2.500 
1-1/8 1.1250 1.149  1.098  1.688  1.631  2.386  2.239  .780  .720  0.09  0.03  2.500 2.750 
1-1/4 1.2500 1.277  1.223  1.875  1.812  2.652  2.489  .876  .812  0.09  0.03  2.750  3.000 
1-3/8  1.3750 1.404  1.345  2.062  1.994  2.917  2.738  .940  .872  0.09  0.03  3.000  3.250 
1-1/2 1.5000 1.531 1.470 2.250 2.175 3.182 2.986 1.036 .964 0.09 0.03 3.250 3.500

Square Head Bolts Tolerance on Length

Nominal Bolt Diameter Up to 1 in., incl.
Over 1 in. to 2-1/2 in., incl. Over 2-1/2 in. to 4 in., incl. Over 4 in. to 6 in., incl. Longer than 6 in.
1/4 - 3/8 +0.02 -0.03 +0.02 -0.04 +0.04 -0.06 +0.06 -0.10 +0.10 -0.18

7/16 & 1/2

+0.02 -0.03 +0.04 -0.06 +0.06 -0.08 +0.08 -0.10 +0.12 -0.18
9/16 - 3/4 +0.02 -0.03 +0.06 -0.08 +0.08 -0.10 +0.10 -0.10 +0.14 -0.18
7/8 - 1     +0.08 -0.10 +0.10 -0.14 +0.12 -0.16 +0.16 -0.20
1-1/8 - 1-/12     +0.12 -0.12 +0.16 -0.16 +0.18 -0.18 +0.22 -0.22

Square Head Bolts Mechanical Statistics

Hardness

Bolts of a length less than 3 times diameter: Rockwell B69-100
Bolts of a length 3 times diameter and longer: Rockwell B100 maximum

Tensile Strength

60,000 psi. minimum

Elongation in 2 in. 18% minimum

Grades of Stainless Steel Square Head Bolts

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

Grades of Duplex & Super Duplex Steel Square Head Bolts

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

Grades of Nickel Alloys Square Head Bolts

  • Inconel 600 Square Head Bolts
  • Inconel 601 Square Head Bolts
  • Inconel 625 Square Head Bolts
  • Inconel 718 Square Head Bolts
  • Incoloy 800 Square Head Bolts
  • Incoloy 825 Square Head Bolts
  • Monel 400 Square Head Bolts
  • Monel K500 Square Head Bolts
  • Nickel 200 Square Head Bolts
  • Nickel 201 Square Head Bolts
  • Hastelloy C276 Square Head Bolts
  • Hastelloy C22 Square Head Bolts
  • Hastelloy B2 Square Head Bolts
  • Hastelloy B3 Square Head Bolts
  • Hastelloy X Square Head Bolts

Grades of Titanium Square Head Bolts

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

Grades of Tantalum Square Head Bolts

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

Grades of Copper Square Head Bolts

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

Grades of Cupro Nickel Square Head Bolts

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

Grades of Brass Carriage Square Head Bolts

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

Grades of Aluminium Square Head Bolts

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

Grades of Carbon Steel Square Head Bolts

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

Grades of Alloy Steel Square Head Bolts

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

Grades of Silicon Bronze Square Head Bolts

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

Grades of Phosphor Bronze Square Head Bolts

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

Grades of Zirconium Square Head Bolts

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

Grades of Beryllium Copper Square Head Bolts

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

Grades of High Tensile Square Head Bolts

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

Grades of Nimonic Square Head Bolts

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

Grades of Nitronic Square Head Bolts

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

Characteristics of Square Head Bolts

  • Distinctive Head Shape: Square head bolts feature a square-shaped head, providing a unique appearance and facilitating easy gripping and tightening with a wrench or pliers.
  • Diverse Material Options: Square head bolts are available in a wide range of materials, including carbon steel, stainless steel, and alloy steel, catering to various environmental and load requirements.
  • Secure Fastening: The square head design offers excellent torque transmission, ensuring a tight and secure connection, making them suitable for heavy-duty applications.
  • Wide Range of Sizes: Square head bolts come in various sizes, making them versatile for a variety of projects, from small-scale applications to large industrial constructions.
  • Compliance with Standards: Square head bolts are manufactured to adhere to industry standards such as DIN, ASTM, ISO, and BS, ensuring consistent quality and compatibility with other components.
  • Resistant to Corrosion: Depending on the chosen material and coatings, square head bolts can offer excellent resistance to corrosion, making them suitable for outdoor and corrosive environments.
  • Applications in Structural Work: Square head bolts are commonly used in structural applications, including timber framing, wooden boat construction, and other projects where a distinctive appearance is desired.
  • Customization Options: Manufacturers often provide customization options for square head bolts, including variations in length, threading, and finishes to meet specific project requirements.

Applications of Square Head Bolts

Square head bolts, renowned for their distinctive appearance and reliable performance, find diverse applications across various industries. These versatile fasteners are designed to provide secure and sturdy connections. Here are some key applications of square head bolts:

1. Construction: Square head bolts are frequently used in construction projects, particularly in timber framing and heavy wooden structures. Their unique appearance adds an aesthetic touch while ensuring structural stability.

2. Machinery and Equipment: Square head bolts play a vital role in securing heavy machinery components, including engines, conveyor systems, and manufacturing equipment, where torque and stability are essential.

3. Marine and Shipbuilding: In maritime and shipbuilding applications, square head bolts are used to fasten wooden and metal components in boat and ship construction, offering durability and a distinctive look.

4. Automotive Restoration: Enthusiasts and professionals involved in automotive restoration projects often utilize square head bolts for their vintage and classic car restorations due to their traditional appearance and reliable performance.

5. Timber Structures: Square head bolts are the preferred choice for joining timber beams and posts in timber frame construction, ensuring a robust and visually appealing connection.

6. Agricultural Machinery: In the agricultural sector, square head bolts secure critical components of farming equipment, such as plows and combines, where durability and ease of maintenance are crucial.

7. Decorative Hardware: Square head bolts are also used in decorative applications, including furniture assembly and architectural details, where they provide both functionality and an attractive design element.

8. Custom Fabrications: Many artisans and craftsmen incorporate square head bolts into custom metal and woodwork projects to achieve a unique and rustic appearance.

9. Restoration of Historical Buildings: Square head bolts are often chosen for restoration work on historical buildings to maintain authenticity while ensuring structural integrity.

These versatile fasteners are favored for their distinctive appearance and reliable performance, making them a valuable choice across a wide spectrum of applications.

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Square Head Bolts - FAQs

Square head bolts are fasteners with a square-shaped head, offering a distinctive appearance. They are known for their excellent torque transmission and are often used for aesthetic and structural purposes, particularly in timber construction and vintage restorations.

Square head bolts can be suitable for outdoor use, depending on the material and coatings chosen. Stainless steel square head bolts, for example, offer excellent corrosion resistance, making them ideal for outdoor and marine applications.

Square head bolts and hex head bolts serve similar functions but have different appearances. While they can often be used interchangeably, the choice may depend on the desired aesthetics and the specific requirements of your project.

Yes, square head bolts are available in various materials, including carbon steel, stainless steel, and alloy steel. The choice of material depends on factors such as load, corrosion resistance, and environmental conditions.

Square head bolts find applications in construction, shipbuilding, automotive restoration, agriculture, and decorative hardware, among others. They are versatile fasteners appreciated for both functionality and aesthetics.

Yes, many manufacturers offer customization options for square head bolts, including different lengths, threads, and finishes, allowing you to tailor the fasteners to your specific project needs.

While there are no specific standards exclusively for square head bolts, they often conform to general fastener standards like DIN, ASTM, ISO, or BS, ensuring quality and compatibility with industry norms.

Square head bolts are a popular choice for historical building restorations due to their traditional appearance. They provide both structural integrity and an authentic aesthetic, making them well-suited for such projects.

Regular inspection for corrosion and proper torque is essential for square head bolts used outdoors. Applying appropriate coatings and lubricants can help enhance their longevity and performance in outdoor environments.

Square Head Bolts - Export Destination

Square Head 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 Bolts Suppliers in South America

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

Square Head 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 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 Bolts Suppliers in Australia

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