S-91571A260 1/2"-13 x 4" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• Exceptional structural integrity with 120,000 psi tensile strength for reliable performance in heavy-duty applications
• Optimized load distribution through 3" grip length and Class 2A thread fit ensuring secure, vibration-resistant connections
• Superior durability with Rockwell C19 hardness steel construction resisting wear and deformation under stress
• Quick installation efficiency with coarse UNC threading and external hex drive enabling rapid assembly in time-sensitive projects
• Regulatory compliance assurance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 standards for quality-controlled applications
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable industrial operations
• Versatile partial threading allowing both clamping and threaded engagement flexibility in structural connections

Professional Applications & Engineering Value

Engineered for structural steel connections and heavy machinery assembly, these Grade A325 hex head screws solve critical fastening challenges in construction and industrial sectors. The 1/2"-13 UNC coarse thread configuration combined with partial threading provides optimal stress distribution across the 3" grip length, preventing joint failure in dynamic load environments. The external hex drive facilitates high-torque installation while the Rockwell C19 hardness ensures maintained clamp force under vibration. These steel fasteners deliver predictable performance in structural fastening applications where ASME B18.2.6 compliance is mandatory for safety-critical connections.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent engagement. Thread specifications include 1/2"-13 UNC coarse thread with right-hand direction and 1" thread length. Full compliance with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing specifications. Environmental compliance verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for hazardous substance restrictions.