S-91309A546 1/4"-20 x 1 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced Durability: Zinc plating provides superior corrosion resistance, extending service life in harsh industrial environments
- High Load Capacity: 60,000 PSI tensile strength ensures reliable performance under heavy-duty mechanical stress
- Secure Fastening: Class 2A thread fit maintains precise tolerances for vibration-resistant connections
- Quick Installation: UNC coarse thread spacing and external hex drive enable rapid assembly with standard tools
- Material Reliability: Steel construction with Rockwell B69 hardness balances strength with machinability
- Full Thread Engagement: Completely threaded shank maximizes grip strength across the entire fastener length
- Industry Compliance: Meets ASME B18.2.1 and ASTM A307 specifications for guaranteed engineering quality
Professional Applications & Engineering Value
This 1/4"-20 UNC hex head screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and structural integrity are critical. The zinc plated finish provides essential corrosion protection for machinery, equipment frames, and structural assemblies exposed to environmental elements. The coarse thread spacing ensures reliable performance in softer materials and applications subject to vibration, while the external hex drive allows for high-torque installation without stripping. Engineered to ASTM A307 Grade 2 standards, this fully threaded fastener maintains consistent 60,000 PSI tensile strength across its entire 1-1/2" length, making it ideal for heavy-duty construction, manufacturing equipment, and industrial maintenance where failure is not an option.
Specification Summary & Compliance
This hex head screw features Class 2A thread fit per UNC standards with right-hand threading and coarse spacing. Manufactured to ASME B18.2.1 specifications and ASTM A307 Grade 2 requirements, it delivers precise dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
