S-91290A892 M30 x 300 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 the most demanding heavy-duty applications, preventing fastener failure under extreme loads.
• Superior corrosion resistance provided by the black-oxide coating on alloy steel, extending the screw's service life in harsh industrial environments.
• High-strength Class 12.9 rating and Rockwell C37 hardness guarantee maximum durability and resistance to wear and deformation.
• Precise hex socket drive (22mm) allows for high-torque installation and a secure, flush fit, minimizing the risk of stripping and enabling use in confined spaces.
• Optimized thread design with a coarse M30x3.5 pitch and Class 5g6g fit ensures rapid assembly and a secure, vibration-resistant connection.
• Partially threaded shank provides an unthreaded bearing surface for improved clamping force and alignment in precise engineering applications.
• Full compliance with international standards including DIN 912/ISO 4762, RoHS 3, and REACH, ensuring material quality, safety, and global acceptability.

Professional Applications & Engineering Value

This M30 Socket Head Cap Screw is engineered to solve critical fastening challenges in heavy machinery, automotive, and construction sectors. The core value lies in its Class 12.9 alloy steel construction, which provides the high tensile strength needed to withstand intense dynamic loads and vibrations without shearing. The black-oxide surface treatment is crucial for applications exposed to moisture and chemicals, significantly reducing the risk of corrosion-induced failure and minimizing maintenance downtime. The coarse metric thread (M30x3.5) and partially threaded design allow for faster installation and superior clamping on large structural components, making it an indispensable industrial fastener for assembling presses, molds, and heavy-duty frames where reliability is non-negotiable.

Specification Summary & Compliance

This screw conforms to the dimensional and mechanical specifications of DIN 912 / ISO 4762. The metric thread is manufactured to a Class 5g6g tolerance for a precise and consistent fit. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free from hazardous substances and meets the latest environmental and safety regulations for industrial components.