S-91236A550 1/4"-20 x 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 corrosion resistance with zinc plating, extending service life in demanding industrial environments
- Superior tensile strength rated at 60,000 psi for reliable performance in high-stress applications
- Easy installation and removal with external hex drive design and standard 7/16" head width
- Secure fastening through Class 2A thread fit and UNC coarse threading for vibration resistance
- Optimized thread engagement with partial threading and 3/4" minimum thread length for material compatibility
- Consistent quality assurance meeting ASME B18.2.1 and ASTM A307 manufacturing specifications
- Environmental compliance with RoHS 3 and REACH regulations for safe industrial usage
Professional Applications & Engineering Value
These 1/4"-20 hex head screws deliver exceptional engineering value across industrial applications where vibration resistance and corrosion protection are critical. The steel construction with Rockwell B69 hardness ensures dimensional stability under load, while the zinc plating provides essential protection against environmental degradation. The UNC coarse threading and partial threading design prevent cross-threading during assembly and allow for precise clamping force distribution. Ideal for machinery assembly, structural frameworks, and equipment maintenance, these hex head screws solve common fastening challenges through their 60,000 psi tensile strength and standardized external hex drive compatibility with common tools.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC 1/4"-20 thread specifications. Complies with ASME B18.2.1 dimensional standards and ASTM A307 material requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features right-hand thread direction with coarse thread spacing and 2" overall length for consistent performance across industrial applications.
