S-91290A888 M30 x 140 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress and heavy-duty applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments, minimizing maintenance needs.
• High-strength Class 12.9 rating and Rockwell C37 hardness provide excellent durability and resistance to wear and deformation under load.
• Precise Class 5g6g thread fit guarantees smooth assembly and secure fastening, reducing installation time and improving joint integrity.
• Partially threaded design with 72mm thread length offers optimal grip and clamping force where needed, enhancing structural stability.
• Standard hex drive (22mm) allows for easy installation and removal with common tools, increasing efficiency in maintenance and assembly operations.
• Compliance with DIN 912/ISO 4762 ensures dimensional accuracy and interchangeability, supporting global engineering standards and supply chain consistency.

Professional Applications & Engineering Value

This M30x3.5mm Class 12.9 Socket Head Cap Screw is engineered from black-oxide alloy steel to address critical challenges in demanding sectors such as heavy machinery, automotive assembly, and construction equipment. The coarse thread pitch and partially threaded rod design provide superior clamping force and vibration resistance, preventing loosening in dynamic environments. With a tensile strength of 170,000 psi and high hardness, it withstands extreme loads and impacts, reducing downtime and replacement costs. The socket head with a 22mm hex drive facilitates access in confined spaces, streamlining installation in complex assemblies. Ideal for applications requiring high-strength metric screws that comply with international standards, this fastener delivers reliable performance in critical joints and structural connections.

Specification Summary & Compliance

This product features a metric thread size M30x3.5mm with Class 5g6g thread fit for precise tolerance, ensuring consistent performance. It adheres to DIN 912 and ISO 4762 specifications for dimensional accuracy and mechanical properties. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in industrial markets.