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Socket Head Cap Screw

The Socket Head Cap Screw is a high-strength fastener designed for applications requiring a precise and secure fit. Featuring a cylindrical head with a hexagonal socket, this screw allows for high torque installation and is commonly used in tight spaces where other types of bolts cannot be used. With excellent corrosion resistance, these screws are ideal for automotive, construction, and machinery applications. Pankaj International offers high-quality socket head cap screws that meet stringent international standards, ensuring reliability and longevity in demanding environments.

Size Range
Diameter Metric: M6 to M42
Inch: 5/16" to 2"
Length Metric: 20 mm to 300 mm
Inch: 7/8 to 12"
Technical Specifications


Dia. p d h k c s e t
Max. Min. Max. Min. Max. Min. Max. Max. Min. Min. Min.
M6 1 6.00 5.82 10.22 9.78 6.00 5.7 0.6 5.084 5.020 5.72 3
M8 1.25 8.00 7.78 13.27 12.73 8.00 7.64 0.8 6.095 6.020 6.86 4
M10 1.5 10.00 9.78 16.27 15.73 10.00 9.64 1 8.115 8.025 9.15 5
M12 1.75 12.00 11.73 18.27 17.73 12.00 11.57 1.2 10.115 10.025 11.43 6
M16 2 16.00 15.73 24.33 23.67 16.00 15.57 1.6 14.142 14.032 16 8
M20 2.5 20.00 19.67 30.33 29.67 20.00 19.48 2 17.23 17.05 19.44 10
M24 3 24.00 23.67 36.39 35.61 24.00 23.48 2.4 19.275 19.065 21.73 12
M30 3.5 30.00 29.67 45.39 44.61 30.00 29.48 3 22.275 22.065 25.15 15.5
M36 4 36.00 35.61 54.46 53.54 36.00 35.38 3.6 27.275 27.065 30.85 19
M42 4.5 42.00 41.61 63.46 62.54 42.00 41.38 4.2 32.33 32.08 36.57 24
M48 5 48.00 47.61 72.46 71.54 48.00 47.38 4.8 36.33 36.08 41.13 28


Tensile Strength Size Range Equivalent Standards
Property Class Diameter Length
PSI N/mm2 Grade Metric Inch Metric Inch IS ISO DIN BS ANSI JIS
60000 to 174000 400 to 1200 4.6 to 12.9 M6 to M48 0.2 “ to 1.9 " 20 mm to 300 mm 0.8 " to 11.8" 2269 4762 912 4168 2470 B18.3.1M B1176



1. Superior Torque and Strength


Socket Head Cap Screws are designed for high-torque applications, making them ideal for projects that require secure fastening and precise installation. The hex socket design enables easy engagement with tools, providing enhanced grip and the ability to withstand high rotational force without damaging the head. These fasteners are commonly used in automotive, aerospace, and machine assembly applications where strength and reliability are essential. Their ability to handle extreme forces makes them the preferred choice for critical fastening applications.


2. Exceptional Corrosion Resistance


Made from stainless steel and available in galvanized and zinc-coated finishes, Socket Head Cap Screws are engineered to provide superior resistance against corrosion, even in harsh environments. Whether exposed to moisture, chemicals, or extreme temperatures, these screws maintain their integrity and functionality over time. Their corrosion-resistant properties make them ideal for industries such as marine, construction, and heavy machinery, where fasteners are constantly exposed to challenging conditions.


3. Versatile Applications and Industries


These screws are used across a variety of industries, including automotive, construction, aerospace, and renewable energy. Their versatility allows them to be used in a wide range of applications, from securing parts in engines and machinery to fastening components in structural installations. The precision-engineered design makes them a go-to choice for projects that require durable and reliable fastening solutions. Additionally, their compact size allows for use in confined spaces, where standard bolts cannot be used effectively.


4. International Quality Standards


Socket Head Cap Screws from Pankaj International are manufactured to meet global quality standards, including DIN, ISO, and GOST, ensuring that they meet or exceed industry expectations. These screws are trusted by professionals worldwide for their strength, durability, and reliability in high-demand applications. Whether used in bridges, rail systems, or heavy equipment, these screws provide a secure and dependable fastening solution.


5. Easy Installation and Maintenance


One of the key advantages of the Socket Head Cap Screw is its ease of installation. The hexagonal socket allows for quick and easy engagement with the tool, requiring less effort than traditional screw types. This makes installation faster and more efficient, saving both time and labor costs. Additionally, their low-maintenance design ensures long-term reliability, even in high-wear applications. With proper care, these screws can last for many years without the need for frequent replacements.

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Pankaj International is an ISO Certified Nationwide Manufacturer of Stocked and Custom Nuts, Bolts and Fasteners

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