An Allen cap bolt, also known as a hex cap bolt or hex socket cap bolt, is a fastener commonly used in construction and mechanical applications. It is made up of a head with a hexagonal shape and a body with internal threads. The head of the bolt is typically wider than the body, which allows it to be tightened or loosened using a tool such as a hex key or Allen wrench.

One of the main properties of Allen cap bolts is their strong holding power. The hexagonal shape of the head allows for a larger surface area to be in contact with the material it is being fastened to, which helps to distribute the load evenly and prevent the bolt from slipping or loosening. Additionally, the internal threads on the bolt's body allow it to be screwed into a nut or tapped hole, creating a secure connection between the two parts.

Allen cap bolts are also known for their versatility and ease of use. They can be used in a wide range of materials, including metal, plastic, and wood, and can be tightened or loosened with minimal effort using a simple tool. This makes them a popular choice for many different types of projects, including automotive repair, furniture assembly, and construction.

Socket Head Bolt / Allen Cap Bolt

Another important property of Allen cap bolts is their corrosion resistance. Many versions of these bolts are made from stainless steel or other corrosion-resistant materials, which helps to prevent rust and other forms of deterioration. This makes them well-suited for use in outdoor or wet environments, where traditional steel bolts might quickly rust and become unreliable.

Overall, Allen cap bolts are a reliable and convenient choice for many different types of fastening applications. Whether you are working on a construction project, assembling furniture, or repairing a car, these bolts can help you get the job done quickly and effectively. Their strong holding power, versatility, and corrosion resistance make them a popular professional choice.

At our company, we take every precaution to ensure the safety, packaging, and delivery of our Allen cap bolts. To ensure safety, we provide clear instructions for handling and installation and test each batch of bolts for strength and durability. We use high-quality packaging materials such as bubble wrap and cardboard boxes to protect the bolts during shipping and storage. And to ensure timely and reliable delivery, we offer a variety of delivery options and provide tracking information to our customers. By taking these steps, we can provide our customers with high-quality, reliable bolts they can trust.

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On Time Deliveries

ISO 9001 : 2015


Standard ISO 4017, DIN931, GB5783, DIN, ASTM, ANSI, JIS, EN, AS
DIN Standard B.S. DIN933 DIN931 DIN934 DIN912 DIN603 DIN6923
Stainless Steel Allen Bolts Size M2 – M100
Stainless Steel Allen Bolts Diameter M3-M60
Stainless Steel Allen Bolts Length 6mm-500mm
Head Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc
Neck type Hex, Square, Triangular, Oval & Knurled etc
Dimensions ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded.
Stainless Steel Allen Bolts Material 18-8 Stainless Steel, stainless steel ss 304/ SS316 A2/A4, SS201, SS303, SS304, SS316, SS316L, SS904L, A2-70; A4-70; A4-80

Dimensions Chart of Allen Cap Bolts :-

Thread Length
Head diameter Head high Socket width Socket Depth
(t min.)
(dk max.) (dk min.) (k max.) (k min.) (s Nom.) (s min.) (s max.)
M 3 18,0 5,5 5,32 3,0 2,86 2,5 2,52 2,58 1,3
M 4 20,0 7,0 6,78 4,0 3,82 3,0 3,02 3,08 2,0
M 5 22,0 8,5 8,28 5,0 4,82 4,0 4,02 4,095 2,5
M 6 24,0 10,0 9,78 6,0 5,7 5,0 5,02 5,14 3,0
M 8 28,0 13,0 12,73 8,0 7,64 6,0 6,025 6,14 3,5
M 10 32,0 16,0 15,73 10,0 9,64 8,0 8,025 8,175 4,0
M 12 36,0 18,0 17,73 12,0 11,57 10,0 10,025 10,175 5,0
M 14 40,0 21,0 20,67 14,0 13,57 12,0 12,032 12,212 6,0
M 16 44,0 24,0 23,67 16,0 15,57 14,0 14,032 14,212 7,0
M 20 52,0 30,0 29,67 20,0 19,48 17,0 17,05 17,23 8,0
M 24 60,0 36,0 35,61 24,0 23,48 19,0 19,065 19,275 10,0
M 27 66,0 40,0 39,61 27,0 26,48 19,0 19,065 19,275 12,0
M 30 72,0 45,0 44,61 30,0 29,48 22,0 22,065 22,275 13,5
Diameter 3 4 5 6 8 10 12
Pitch 0.5 0.7 0.8 1.0 1.25 1.5 1.75
Head Height 3.5 4 5 6 8 10 12
Head Diam 5.5 7.5 8.5 10 13 16 18
Key Size 2.5 3 4 5 6 8 10

Dome Head Allen Bolts Weight Chart :-

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