Essential details
Quantity(pieces):500
MOQ:100
Shipping:Sea freight, Air freight
Specification Number:M6-M24
Product Introduction
Our high tensile socket head cap screws are available in 10.9 grade and 12.9 grade, finished with black oxidation.
- 10.9 Grade: Raw material 40Cr, ideal for general mechanical assembly, equipment frames and conventional fastening.
- 12.9 Grade: Raw material 35CrMo (SCM435), higher tensile & yield strength, designed for molds, heavy-duty fixtures, high-vibration and critical load-bearing joints.
Black oxide surface treatment provides a stable friction coefficient without changing dimensional tolerance. Please note this finish only offers limited rust resistance, recommended for dry indoor working conditions.
Specification & Standard
Standard: DIN912 / GB/T 70.1
Available sizes: M3, M4, M5, M6, M8, M10, M12, M16, M20
Custom lengths are acceptable for bulk orders.
Installation Tips
Match with qualified grade nuts:
10.9 screws ≥ Grade 8 nuts
12.9 screws ≥ Grade 10 nuts
Reference tightening torque is available. Reduce torque by 20% if lubricant is applied to avoid screw fracture.
Not recommended for repeated use on key stressed connections.
Application Scenarios
Mechanical equipment, injection molds, automation machinery, tooling fixtures, hydraulic equipment, engineering machinery and metal structural assembly.
Service
Material Test Certificate (MTC) can be provided upon request. Support bulk wholesale and customized requirements.





