S-91255A152 6-32 x 7/8" ASME B18.3 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability with 120,000 psi tensile strength and Rockwell C39 hardness, ideal for high-stress industrial environments.
• Superior corrosion resistance from the black-oxide coating, extending service life in harsh conditions.
• Precise thread engagement with Class 3A fit and UNC coarse threading, ensuring reliable fastening and reduced cross-threading risks.
• Efficient installation and removal via the 5/64" hex drive, providing a secure grip and minimizing tool slippage.
• Full threading design offers consistent holding power along the entire 7/8" length for versatile applications.
• Compliance with industry standards including ASME B18.3 and ASTM F835, guaranteeing quality and interchangeability.
• Environmental and safety adherence with RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these black-oxide alloy steel screws combine high tensile strength and hardness to withstand heavy loads and vibrations, reducing failure risks in machinery and equipment. The 6-32 UNC coarse thread and Class 3A fit provide tight tolerances for secure fastening in metals and plastics, while the rounded button head and hex drive enable flush, low-profile installations with easy access in confined spaces. Ideal for automotive, aerospace, and electronics assemblies, they address common issues like corrosion and loosening, ensuring long-term reliability and minimal maintenance.

Specification Summary & Compliance

This product features precise Class 3A thread fit and UNC coarse threading with a diameter of 0.138" and length of 7/8", manufactured to ASME B18.3 and ASTM F835 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.