Hexagon Socket Head Cap Bolts
Hex socket head cap screws, also known as hex socket head cap bolts, are widely used high-strength fasteners known for their cylindrical head and internal hex drive. Designed for precision assembly and reliable torque transmission, a hex socket head cap screw provides excellent clamping force while allowing installation in restricted spaces where external-drive bolts cannot operate efficiently.
Product Description
Specification of Hex Socket Head Cap Bolts:
- Standard: ISO 4762, DIN 912, and ANSI/ASME B18.3.
- Material: Carbon steel, alloy steel, and stainless steel grades such as A2-70 and A4-80.
- Surface Finish: Black oxide, zinc plating, hot-dip galvanisation, nickel plating, Dacromet.
- Thread Types: Fully threaded / partially threaded
- Size: M1.4-M24.
- Non-standard customized are acceptable.
Payment Terms: L/C, T/T
Packaging & Shipping:
- Packaging: Plastic woven bag, carton, or according to customer requirements
- Shipping: Container shipping
- Port of Loading: Ningbo/Shanghai
Features of Hex Socket Head Cap Bolts:
A hex socket head cap screw features a deep hex recess that allows higher torque without damaging the drive surface. Its cylindrical head offers a compact shape that fits flush in countersunk pockets, maximising available space in precision assemblies.
The screw’s high tensile strength, uniform thread accuracy, and reliable fatigue resistance make it suitable for applications requiring durable and vibration-resistant fastening. Stainless steel models additionally provide superior corrosion protection.
Advantages of Hex Socket Head Cap Bolts:
The hex socket head cap screw provides several functional advantages compared with traditional external-drive bolts. Its internal drive design reduces the risk of head stripping and improves operator safety during installation. Because the required tool size is smaller, the screw allows assembly in deep recesses and narrow spaces where spanners cannot be used.
The fastener also delivers strong preload with consistent torque control, enhancing mechanical stability in dynamic environments. It is a preferred choice for high-precision equipment, high-strength mechanical joints, and compact structural designs.
Applications of Hex Socket Head Cap Bolts:
Hex socket head cap screws are used across a wide range of industries due to their strength, versatility, and clean appearance. They are commonly applied in:
- Mechanical engineering: motors, gearboxes, machine frames
- Automotive systems: engines, brake systems, chassis components
- Electronics & instruments: equipment housings, mounting brackets
- Industrial equipment: pumps, compressors, automation systems
- Furniture assembly: metal frames, adjustable mechanisms
The combination of torque efficiency and head compactness makes the hex socket head cap screw particularly suitable for applications requiring a strong and stable connection in limited installation space.
Why Choose Xinchi Fastener Factory?
Xinchi Fastener Factory is a specialized manufacturer with strong production capacity and strict quality control.
Our advantages include:
- 102 sets of cold-heading machines, supporting high-volume production
- Daily output exceeding 10 million pieces, ensuring a stable supply
- New factory of 30,000 ㎡, featuring two modern six-story workshops
- Strict compliance with ISO, DIN, and ANSI standards
- Professional OEM/ODM capability for non-standard hex socket head cap screws
We provide consistent quality, fast delivery, and competitive pricing to support your long-term projects.