S-91571A256 1/2"-13 x 2 1/2" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
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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
- Exceptional structural integrity with Grade A325 classification and 120,000 psi tensile strength, ensuring reliable performance in high-stress applications.
- Superior wear resistance due to Rockwell C19 hardness, extending service life in demanding industrial environments.
- Optimized load distribution from the 1 1/2" grip length and partially threaded design, minimizing stress concentration and enhancing joint stability.
- Easy installation and removal with the 7/8" external hex head, allowing for standard wrench access and efficient assembly.
- Secure coarse threading with UNC 1/2"-13 and Class 2A fit, providing robust holding power and vibration resistance in structural connections.
- Full regulatory compliance including RoHS 3 and REACH, ensuring environmental safety and global project suitability.
- Proven dimensional accuracy per ASME B18.2.6, ASTM A325, and ASTM F3125 standards, guaranteeing interchangeability and consistent quality.
Professional Applications & Engineering Value
Engineered for heavy-duty structural applications, this Grade A325 hex head screw addresses critical challenges in construction and industrial assembly. The steel material combined with high tensile strength (120,000 psi) and Rockwell C19 hardness resists deformation under extreme loads, preventing joint failure in bridges, buildings, and machinery. The partially threaded configuration with UNC coarse threads ensures maximum engagement in thick materials, while the external hex drive facilitates quick installation with common tools. By meeting ASME B18.2.6 and related standards, it provides reliable performance in structural bolting scenarios, reducing maintenance needs and enhancing project longevity.
Specification Summary & Compliance
This fastener features precise Class 2A thread fit for consistent engagement and is manufactured in accordance with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility. The 1/2"-13 UNC coarse thread and 2 1/2" length provide standardized dimensions for reliable integration into industrial systems.
