S-91255A095 3-48 x 1/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
• Superior thread engagement with Class 3A precision fit ensuring reliable, vibration-resistant fastening connections
• High tensile strength rating of 120,000 psi provides exceptional load-bearing capacity for critical applications
• Optimized drive efficiency through hex drive design allowing secure tool engagement and reduced stripping risk
• Enhanced material durability from alloy steel construction with Rockwell C39 hardness for wear resistance
• Versatile installation compatibility with standard UNC coarse threading facilitating quick assembly in various materials
• Rounded button head profile offers both aesthetic appeal and reduced snagging in confined spaces

Professional Applications & Engineering Value

These 3-48 UNC rounded head screws deliver critical performance advantages in precision assembly applications where vibration resistance and corrosion protection are paramount. The black-oxide alloy steel construction combined with Class 3A thread fit addresses common industrial challenges of thread galling and environmental degradation. The fully threaded design ensures maximum engagement in thin materials and delicate components, while the hex drive configuration prevents cam-out during high-torque installation. Ideal for electronics enclosures, machinery guards, and precision instrumentation, these coarse thread screws provide reliable fastening solutions that withstand rigorous operational demands while maintaining compliance with industry standards.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread tolerances with UNC coarse threading (3-48 size) and 1/8" length. These screws conform to ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe use across various industries. The right-hand thread direction and fully threaded construction provide consistent fastening performance meeting industrial quality standards.