Qi Sheng hexagon socket screws (Allen/hex socket drive) are designed for assemblies where space is limited and a clean, compact fastening solution is required. The internal hex drive enables reliable torque application and is widely used in equipment manufacturing, tooling, automation, and maintenance.
We can supply various socket screw head styles and dimensions to suit different joint designs and load requirements, with material and finish options for durability and corrosion resistance. OEM and wholesale orders are supported with consistent quality control and packaging customization.
Send us the screw type, size, material/grade, finish, and quantity to receive a fast quotation.

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Combined Bolt/Socket Head Cap Bolt with Captive Washer
High-strength bolt with captive washer for secure fastening applications.

Combined Bolt/Socket Head Cap Bolt with Captive Washer

  1. A specialized combined fastener integrating a socket head cap boltwith a captive washer (washer fixed to the bolt shank, non-detachable)
  2. Complies with international standards such as ISO 4762 (bolt) and DIN 125 (washer), ensuring dimensional accuracy and interchangeability
  3. Common materials include carbon steel (e.g., 45#), stainless steel (e.g., 304, 316), and alloy steel
  4. With high-strength variants undergoing heat treatment
Hexagon Socket Head Cap Bolt with Serration
Hexagon Socket Head Cap Bolt with Serration

Hexagon Socket Head Cap Bolt with Serration

  1. Belongs to precision fasteners, integrating the functions of hexagon socket bolts and anti-loosening serrations
  2. Complies with international standards such as ISO 4762 and DIN 912, categorized as hexagon socket head cap bolts with serrated underhead
  3. Common materials include carbon steel (e.g., 45#), stainless steel (e.g., 304, 316), and alloy steel (e.g., 42CrMo)
  4. Strength grades range from 4.8 to 12.9, with high-strength variants undergoing quenching and tempering heat treatment
Knurled Cap Head Hex Socket Bolt
Knurled Cap Head Hex Socket Bolt

Knurled Cap Head Hex Socket Bolt

  1. Complies with international standards such as ISO 4762 (modified) and DIN 912 (knurled variant)
  2. Integrates a knurled cylindrical headand hexagon socket design, available in full-thread or half-thread configurations
  3. Common materials include carbon steel (e.g., 45#), stainless steel (e.g., 304, 316), and alloy steel (e.g., 42CrMo)
  4. Strength grades range from 4.8 to 12.9
  5. with high-strength variants undergoing heat treatment
Socket Head Cap Screws/Bolts
Socket Head Cap Screws/Bolts

Socket Head Cap Screws/Bolts

  1. Complies with international standards such as ISO 4762, DIN 912, and ANSI B18.3
  2. Categorized as precision hexagon socket head cap fasteners
  3. Common materials include carbon steel (e.g., 45#), stainless steel (e.g., 304, 316), and alloy steel (e.g., 42CrMo)
  4. Belongs to versatile fasteners, available in full-thread or half-thread designs to meet different connection needs
  5. Strength grades range from 4.8 to 12.9
  6. With high-strength variants undergoing quenching and tempering heat treatment