S-91274A092 8-32 x 2 1/2" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-flake coating, ideal for harsh industrial environments
• High tensile strength of 170,000 psi ensures reliable performance under extreme loads
• Precision Class 3A thread fit guarantees secure, vibration-resistant connections
• Partially threaded design provides optimal grip and reduces material stress concentrations
• Rockwell C37 hardness delivers superior wear resistance and long service life
• Standard hex socket drive allows for easy installation with common tools
• Compliance with major industry standards including ASME B18.3 and ASTM A574 for guaranteed quality

Professional Applications & Engineering Value

These zinc-flake-coated alloy steel socket head cap screws deliver critical performance advantages in demanding applications where reliability is paramount. The combination of 170,000 psi tensile strength and Rockwell C37 hardness provides exceptional resistance to mechanical stress and wear, while the Class 3A UNC coarse thread ensures precise engagement and vibration resistance in heavy machinery, automotive assemblies, and industrial equipment. The zinc-flake coating offers superior corrosion protection compared to standard finishes, significantly extending service life in challenging environments. The partially threaded 8-32 configuration with 2-1/2" length provides optimal clamping force distribution, making these socket head cap screws ideal for critical joints requiring both strength and precision alignment.

Specification Summary & Compliance

Manufactured to Class 3A thread fit tolerances with UNC coarse thread spacing and 8-32 thread size. Complies with ASME B18.3 dimensional specifications and ASTM A574 material standards. Meets ASTM B117 salt spray testing requirements. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.