S-91465A182 1/2"-13 x 4" ASTM A307 Square Head Screws
Square 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
- Exceptional tensile strength with 60,000 PSI rating, ensuring reliable load-bearing capacity in industrial assemblies.
- Corrosion-resistant ASTM A307 Grade A steel construction provides long-term durability and consistent performance in harsh environments.
- Coarse UNC threading and Class 2A fit enable quick installation and secure fastening, reducing assembly time and labor costs.
- Partially threaded design allows for precise clamping force control, minimizing material stress and improving joint integrity.
- External square drive head offers superior torque transmission and slip-resistant engagement with standard tools.
- RoHS 3 compliance ensures environmental safety and regulatory adherence for global supply chain requirements.
- Rockwell B69 hardness maintains structural integrity under repetitive stress, extending service life in demanding applications.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial fastening, these square head screws address critical challenges in construction, machinery assembly, and structural frameworks. The ASTM A307 Grade A steel composition delivers optimal strength-to-weight ratio, resisting deformation under static and dynamic loads. With coarse UNC threads and partial threading, they prevent cross-threading in soft materials while allowing adjustable grip length. The external square drive ensures maximum torque application without cam-out, ideal for high-vibration environments like agricultural equipment or conveyor systems. These features collectively reduce maintenance frequency and enhance operational safety in industrial square head screw applications.
Specification Summary & Compliance
This 1/2"-13 UNC square head screw maintains Unified Standard Class 2A thread tolerances for consistent fit with standard nuts. Manufactured per ASTM A307 specifications, it meets low-strength fastener requirements with verified 60,000 PSI tensile strength. Compliant with RoHS 3 (2015/863/EU) regulations, ensuring restricted substance-free material composition. Dimensions include 4" length, 3/4" head width, and 1 1/4" minimum thread length, providing interoperability with industry-standard components.
