S-95373A152 1/4"-20 x 2 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
- Superior corrosion resistance with hot-dipped galvanized finish, ideal for outdoor or high-moisture industrial environments
- High tensile strength of 60,000 psi ensures reliable load-bearing capacity and structural integrity in demanding applications
- Rockwell B69 hardness provides excellent wear resistance and durability for extended service life
- Partially threaded UNC coarse design allows for faster installation and secure fastening in various materials
- External hex drive with 7/16" head width enables easy installation with standard tools and high torque application
- Class 2A thread fit ensures smooth assembly and consistent performance across multiple installations
- Comprehensive regulatory compliance meets ASME B18.2.1, ASTM A307, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These hot-dipped galvanized steel hex head screws deliver exceptional performance in corrosive environments where ordinary fasteners fail. The 1/4"-20 UNC coarse thread configuration provides superior grip in wood, metal, and composite materials, while the partial threading design prevents joint loosening under vibration. The external hex drive accommodates high-torque applications in construction, machinery assembly, and structural framing. With 60,000 psi tensile strength and Rockwell B69 hardness, these screws maintain integrity under heavy loads and repeated stress cycles, making them ideal for industrial equipment, outdoor structures, and manufacturing applications where reliability is critical.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance. The 1/4"-20 UNC coarse thread follows standardized spacing requirements, while the 2-1/2" length with 3/4" minimum thread length ensures proper engagement. Full compliance with ASME B18.2.1 dimensional specifications and ASTM A307 material standards. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for safe industrial use worldwide.
