S-90042A242 M3 x 40 mm ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
• High tensile strength of 100,000 psi provides exceptional load-bearing capacity for demanding mechanical applications.
• Reliable pressure sealing up to 1500 psi using a Buna-N rubber O-ring, preventing leaks in hydraulic and pneumatic systems.
• Wide temperature tolerance from -40° to 225° F allows consistent performance in extreme operating conditions.
• Precise Class 6g thread fit ensures easy installation and secure fastening with minimal risk of cross-threading.
• Standard hex socket drive (2.5 mm) enables high-torque installation in confined spaces with common tools.
• Partially threaded design offers optimal grip strength where full thread engagement isn't required.

Professional Applications & Engineering Value

This M3 socket head cap screw delivers critical engineering solutions where both mechanical integrity and sealing performance are paramount. The combination of 18-8 stainless steel material with Rockwell B85 hardness provides excellent corrosion resistance and durability for machinery, automotive assemblies, and precision equipment. The integrated Buna-N rubber O-ring creates a reliable seal in hydraulic systems, compressed air lines, and fluid handling applications, effectively preventing leaks under pressures up to 1500 psi. The metric coarse thread with Class 6g tolerance ensures precise fitment in industrial fastening applications, while the partially threaded configuration allows for controlled clamping force in critical joints.

Specification Summary & Compliance

This socket head cap screw features M3 x 0.5 mm metric thread with Class 6g tolerance and 40 mm length with 24 mm minimum thread engagement. Manufactured to ASME B18.3, DIN 912, and ISO 4762 standards for dimensional accuracy and interchangeability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe industrial use.