S-91290A825 M16 x 55 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 12.9 strength rating and 170,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by black-oxide coating on alloy steel, extending service life in demanding industrial environments
• Precise installation and removal enabled by 14mm hex drive socket head design, ensuring secure tool engagement and reduced stripping risk
• Optimized thread engagement through Class 5g6g thread fit and M16x2mm coarse pitch, facilitating faster assembly and improved vibration resistance
• Maximum thread coverage with fully threaded design, providing consistent clamping force along the entire 55mm length
• Enhanced durability from Rockwell C37 hardness, maintaining structural integrity under repeated loading cycles
• Global compatibility assurance through DIN 912/ISO 4762 standardization, ensuring interchangeability and quality consistency

Professional Applications & Engineering Value

These M16 socket head cap screws deliver critical engineering solutions for heavy machinery, automotive assemblies, and industrial equipment where high tensile strength and reliable fastening are paramount. The black-oxide alloy steel construction provides essential corrosion protection in harsh operating environments, while the coarse pitch metric thread (M16x2mm) ensures rapid assembly and superior resistance to vibrational loosening. The fully threaded design distributes clamping force evenly across the entire 55mm length, making these Class 12.9 fasteners ideal for critical joints in structural frameworks, manufacturing fixtures, and high-pressure equipment where failure is not an option. The standardized DIN 912/ISO 4762 profile guarantees perfect compatibility with existing tooling and engineering specifications.

Specification Summary & Compliance

Manufactured to precise Class 5g6g thread fit tolerances with standardized M16x2mm coarse pitch right-hand threads. These socket head cap screws conform to DIN 912/ISO 4762 dimensional specifications and meet Class 12.9 mechanical properties (170,000 psi tensile strength, Rockwell C37 hardness). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use worldwide.