A square bolt is a type of fastener with a square-shaped head and a threaded shaft. It is designed to be tightened or loosened using a wrench or socket tool. Square bolts are commonly used in construction and engineering projects, as well as in manufacturing and assembly. They are frequently utilized for the purpose of either fastening heavy loads or connecting various structural elements due to their well-known strength and durability.

Square bolts come in a variety of sizes, with the most common being measured in inches or millimetres. The shaft's diameter and the thread's length determine the size of a square bolt. The head of the bolt is typically larger than the shaft and is designed to be held by a wrench or socket tool while the shaft is threaded into a hole or nut. They can be finished with different coatings or plating to improve corrosion resistance and enhance appearance.

Square bolts are often used in applications where a regular hex bolt may not be suitable, such as when a higher level of torque is required or when a more secure connection is needed. They can also be used in applications where a regular hex bolt may be prone to turning or slipping, such as in high-vibration environments.

Square Bolt

In addition to their strength and durability, square bolts are also known for their versatility. They can be used in various materials, including wood, metal, and concrete, and can be found in various sizes and finishes to suit different applications. Square bolts are often used in applications where a regular hex bolt may not be suitable, such as when a higher level of torque is required or when a more secure connection is needed. They can also be used in applications where a regular hex bolt may be prone to turning or slipping, such as in high-vibration environments.

Square bolts can be purchased at hardware stores or online and are often sold in bulk quantities for larger projects. They are an important and widely used type of fastener that play a critical role in many different industries and applications. Overall, square bolts offer strength, durability, and versatility, making them an essential component in a variety of construction and engineering projects.


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ISO 9001 : 2015

Specification

Stainless Steel Square Bolts Size Square Bolts M2, M3, (M3.5), M4, M5, M6, M8, M10, M12, (M14), M16, (M18), M20, (M22), M24, (M27), M30, M33, M36, M42, (M45), M48 to M160 and Custom Sizes
Grade 18-8 Stainless Steel, 4.8, 8.8, A2, A4, A2-70; A4-70; A4-80 Square Bolts
British standards BS6105 (old: BSENISO 3506) which covers Part 1 bolts, screw and Us, part 2 nuts and part 4 tapping screws.
DIN Standard B.S. DIN 933, DIN 931, DIN 934, DIN 912, DIN 603, DIN 6923, DIN 970, DIN 7981, DIN 7982, DIN916, DIN 913, DIN 7985
ISO – International Organization for Standardization ISO 4032, ISO 4033, ISO 4017, ISO7380 JIS standards
Length 3 mm to 200 mm
Square Bolts, Us Threads: METRIC, BSW, BSF, UNC, UNF or as required
Dimensions ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded.

Stainless Steel Square Bolt Dimensions :-

Square Bolt

Bolt Size A (max) B C (min) D E F
Thread Length
for Bolt Length
max min 6" and
shorter
over 6"
1/4" 0.260 3/8 0.498 11/64 0.03 0.01 0.750 1.000
5/16" 0.324 1/2 0.665 13/64 0.03 0.01 0.875 1.125
3/8" 0.388 9/16 0.747 1/4 0.03 0.01 1.000 1.250
7/16" 0.452 5/8 0.828 19/64 0.03 0.01 1.125 1.375
1/2" 0.515 3/4 0.995 21/64 0.03 0.01 1.250 1.500
5/8" 0.642 15/16 1.244 27/64 0.06 0.02 1.500 1.750
3/4" 0.768 1-1/8 1.494 1/2 0.06 0.02 1.750 2.000
7/8" 0.895 1-5/16 1.742 19/32 0.06 0.02 2.000 2.250
1" 1.022 1-1/2 1.991 21/32 0.09 0.03 2.250 2.500
1-1/8" 1.149 1-11/16 2.239 3/4 0.09 0.03 2.500 2.750
1-1/4" 1.277 1-7/8 2.489 27/32 0.09 0.03 2.750 3.000
1-3/8" 1.404 2-1/16 2.738 29/32 0.09 0.03 3.000 3.250
1-1/2" 1.531 2-1/4 2.986 1 0.09 0.03 3.250 3.500

Dimensions of Grade 10.9 Square Head Bolt :-

Dimensions of Grade 10.9 Square Head Bolt

Stainless Steel Square Bolts Size Chart :-

Screws
Head Nuts  
Lg. Threading Min.
Thread Lg.
Thread
Spacing
Wd. Ht. Tensile
Strength, psi
Specifications
Met
Grade A Steel
1/4"-20
1" Partially Threaded 3/4" Coarse 3/8" 11/64" 60,000 ASTM A307
1 1/4" Partially Threaded 3/4" Coarse 3/8" 11/64" 60,000 ASTM A307
1 1/2" Partially Threaded 3/4" Coarse 3/8" 11/64" 60,000 ASTM A307
2" Partially Threaded 3/4" Coarse 3/8" 11/64" 60,000 ASTM A307
5/16"-18
3/4" Fully Threaded __ Coarse 1/2" 13/64" 60,000 ASTM A307
1" Partially Threaded 7/8" Coarse 1/2" 13/64" 60,000 ASTM A307
1 1/4" Partially Threaded 7/8" Coarse 1/2" 13/64" 60,000 ASTM A307
1 1/2" Partially Threaded 7/8" Coarse 1/2" 13/64" 60,000 ASTM A307
2" Partially Threaded 7/8" Coarse 1/2" 13/64" 60,000 ASTM A307
3" Partially Threaded 7/8" Coarse 1/2" 13/64" 60,000 ASTM A307
4" Partially Threaded 7/8" Coarse 1/2" 13/64" 60,000 ASTM A307
3/8"-16
1" Fully Threaded __ Coarse 9/16" 1/4" 60,000 ASTM A307
1 1/4" Partially Threaded 1" Coarse 9/16" 1/4" 60,000 ASTM A307
1 1/2" Partially Threaded 1" Coarse 9/16" 1/4" 60,000 ASTM A307
1 3/4" Partially Threaded 1" Coarse 9/16" 1/4" 60,000 ASTM A307
2" Partially Threaded 1" Coarse 9/16" 1/4" 60,000 ASTM A307
2 1/2" Partially Threaded 1" Coarse 9/16" 1/4" 60,000 ASTM A307
3" Partially Threaded 1" Coarse 9/16" 1/4" 60,000 ASTM A307
3 1/2" Partially Threaded 1" Coarse 9/16" 1/4" 60,000 ASTM A307
1/2"-13
1" Fully Threaded __ Coarse 3/4" 21/64" 60,000 ASTM A307
1 1/2" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
1 3/4" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
2" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
2 1/4" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
2 1/2" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
3" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
3 1/2" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
4" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
5" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
6" Partially Threaded 1 1/4" Coarse 3/4" 21/64" 60,000 ASTM A307
8" Partially Threaded 1 1/2" Coarse 3/4" 21/64" 60,000 ASTM A307
5/8"-11
2" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
2 1/2" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
3" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
3 1/2" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
4" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
4 1/2" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
5" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
6" Partially Threaded 1 1/2" Coarse 15/16" 27/64" 60,000 ASTM A307
7" Partially Threaded 1 3/4" Coarse 15/16" 27/64" 60,000 ASTM A307
11" Partially Threaded 1 3/4" Coarse 15/16" 27/64" 60,000 ASTM A307
3/4"-10
2 1/2" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
3" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
3 3/4" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
4" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
4 1/2" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
5" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
5 1/2" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
6" Partially Threaded 1 3/4" Coarse 1 1/8" 1/2" 60,000 ASTM A307
7" Partially Threaded 2" Coarse 1 1/8" 1/2" 60,000 ASTM A307
8" Partially Threaded 2" Coarse 1 1/8" 1/2" 60,000 ASTM A307
9" Partially Threaded 2" Coarse 1 1/8" 1/2" 60,000 ASTM A307
10" Partially Threaded 2" Coarse 1 1/8" 1/2" 60,000 ASTM A307
12" Partially Threaded 2" Coarse 1 1/8" 1/2" 60,000 ASTM A307
1"-8
6" Partially Threaded 2 1/4" Coarse 1 1/2" 21/32" 60,000 ASTM A307
7" Partially Threaded 2 1/2" Coarse 1 1/2" 21/32" 60,000 ASTM A307
9" Partially Threaded 2 1/2" Coarse 1 1/2" 21/32" 60,000 ASTM A307
10" Partially Threaded 2 1/2" Coarse 1 1/2" 21/32" 60,000 ASTM A307

Applications & Operations

We at DC Engineering make sure that our every product is made of high quality raw material. We thoroughly test each and every product before dispatching it to our customers. DC Engineering is one of the most trusted manufacturers and suppliers of fasteners and bolts which are applicable in various industries.

  • Gas Processing Industries
  • Petrochemical Industries
  • Power Generation Industries
  • Food Processing Industries
  • Chemical Industries
  • Oil & Gas Industries
  • Fertilizers Industries
  • Sugar Industries






Experimentation & Testing

DC Engineering is known for its accurate and perfect dimensions. We at DC engineering thoroughly test all our products before shipping them to the customers. We carry out destructive as well as non-destructive tests on all our products.

  • Impact Analysis
  • Eddy Current Examining
  • Power Generation Industries
  • Hydrostatic Analysis
  • Prompt Test
  • Positive Material Recognition
  • Large-Scale Test
  • Pitting Protection Test


Packaging & Dispatching

DC Engineering uses the most safest and the most effective ways of packaging for all types of deliveries. We pack our goods in various ways such as:

  • Wooden Boxes
  • Wooden Crates
  • Wooden Pallets
  • Carton Boxes
  • Shrink-Wrapped
  • Bubble Wrap Packing Material
  • Laminated & Metallized Films
  • Wooden or Plastic Crates




Cities We Export

Srinagar, Tamil Nadu, West Bengal, Vijayawada, Maharashtra, Rajkot, Karnataka, Akola, Amravati, Kanpur, Aurangabad, Andhra Pradesh, Saharanpur, Vasai, Varanasi, Faridabad, Bhadreswar, Jhansi, Nashik, Solapur, Surat, Nagpur, Raipur, Haryana, Buxar, Bhavnagar, Pune, Punjab, Banswara, Uttar Pradesh, Tadepalligudem, Manipur,Delhi, Dhanbad, Guntur, Gujarat, Ludhiana, Kalyani, Nagapattinam, Benin, Vadodara, Kerala, Patna, Ulhasnagar, Chhattisgarh, Mizoram, Chennai, Kurnool, Datia, Mangalore, Ambala, Kota, Miryalaguda, Orissa, Mumbai, Nagda, Bikaner, Ballia, Allahabad, Suryapet, Jaipur, Haora, Durgapur, Udgir, Jodhpur, Amritsar, Kalyan, Bangalore, Puducherry, Agra, Kolkata, Tirunelveli, Gujarat, India, Lucknow, Meerut, Dehradun, Bihar, Ujjain, Jharkhand, Ahmedabad, Coimbatore, Sadar, Jamnagar, Hyderabad, Chandigarh, Ranchi, Jamalpur, Ambattur, Jabalpur, Waghala, Nagaur, Gulbarga

Countries We Export

Iran, Ecuador, Mexico, Afghanistan, Bulgaria, Denmark, Kenya, Singapore, Portugal, Venezuela, Sri Lanka, Chile, Gabon, Colombia, Belgium, Peru, Belarus, Yemen, Thailand,France, Italy, Mexico, Greece, Kuwait, Romania, Iraq, Netherlands, Sweden, Switzerland, Lithuania, Lebanon, Poland, Philippines, United Kingdom, Norway, Angola, Kazakhstan, Taiwan, Nigeria, Poland, China, Nigeria, Spain, Mongolia, New Zealand, United States, Hungary, Libya, Serbia, Ukraine, Finland, South Africa, Iran, Vietnam, Israel, Czech Republic, Slovakia, Hong Kong, Azerbaijan, Qatar, Japan, Oman, Malaysia, Pakistan, Algeria, Bangladesh, Jordan, Indonesia, Russia, United Arab Emirates, Brazil, Estonia, Turkey, Austria, Croatia, Ghana, Bahrain, Korea, Canada, Bolivia, Costa Rica, Trinidad & Tobago, Tunisia, Chile, Morocco, Bhutan, Argentina, Egypt