S-91268A310 3/8"-24 x 3" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress environments
• Superior wear resistance due to Rockwell C33 hardness, ensuring long service life and reduced replacement frequency
• Precise thread engagement with Class 2A fit and fine UNF threading for secure fastening and vibration resistance
• Full-length threading provides consistent grip along the entire 3" length, enhancing connection stability
• Heavy-duty Grade 8 steel construction meets ASME B18.2.1/SAE J429 standards for dependable industrial use
• External hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency
• Environmental and safety compliance with RoHS 3 and REACH regulations, supporting sustainable and safe operations

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this Grade 8 hex head screw combines high-strength steel and UNF fine thread design to address critical challenges like vibration loosening and structural fatigue. The fully threaded 3/8"-24 configuration ensures uniform stress distribution, making it ideal for heavy machinery, automotive assemblies, and construction equipment where Class 2A thread fit guarantees precise alignment. With a 150,000 psi tensile strength and external hex drive, it simplifies maintenance while enduring extreme loads, reducing downtime and enhancing operational reliability in industrial applications.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances and UNF fine thread standards per ASME B18.2.1 and SAE J429. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability.