S-91253A029 0-80 x 1/8" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in demanding environments
• Precision Class 3A thread fit ensures secure, vibration-resistant fastening in critical assemblies
• Exceptional 130,000 psi tensile strength provides reliable performance under high-stress conditions
• Rockwell C39 hardness rating maintains structural integrity and prevents thread deformation
• Fully threaded design offers maximum grip length and uniform load distribution
• 82° countersink angle enables flush mounting for streamlined aerodynamic surfaces
• Hex drive compatibility allows for high-torque installation with standard industrial tools

Professional Applications & Engineering Value

These 0-80 UNF flat head screws deliver critical performance advantages in precision engineering applications where space constraints and reliability are paramount. The black-oxide alloy steel construction provides essential corrosion protection while maintaining the 130,000 psi tensile strength required for high-stress assemblies. The Class 3A thread fit with fine thread spacing ensures vibration resistance in machinery, electronics, and aerospace components where loosening could cause catastrophic failure. The fully threaded design maximizes engagement in thin materials, while the 82° countersink angle creates seamless surfaces in aerodynamic and optical applications. These hex drive screws are engineered for precision tooling in confined spaces where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with UNF fine threading and right-hand thread direction. Compliant with ASME B18.3 and ASTM F835 manufacturing specifications. Meets environmental standards including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for hazardous substance restrictions.