S-91309A562 1/4"-20 x 5" 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 zinc plating, extending service life in demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
- UNC coarse threading with Class 2A fit enables quick assembly and secure fastening in various materials
- Fully threaded design offers maximum grip length and uniform stress distribution along the entire shank
- External hex drive allows for high-torque installation using standard tools without stripping
- Compliance with ASME B18.2.1 standards guarantees dimensional accuracy and interchangeability
Professional Applications & Engineering Value
These 1/4"-20 x 5" steel hex head screws are engineered to address critical fastening challenges in industrial settings. The combination of Grade 2 steel construction and zinc plating provides exceptional corrosion resistance, making them ideal for outdoor equipment, machinery assembly, and structural applications where environmental exposure is a concern. The UNC coarse thread design ensures rapid installation and superior holding power in both metal and wood substrates, while the external hex drive accommodates high torque requirements without cam-out issues. With full threading along the 5-inch length, these screws distribute mechanical stresses evenly, preventing localized failure points in heavy-duty applications such as construction frameworks, automotive components, and industrial machinery.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit per UNC standards, ensuring consistent engagement and reliable performance. Manufactured in compliance with ASME B18.2.1 specifications and ASTM A307 material standards, it meets rigorous industrial requirements. The product is fully certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for global industrial use.
