S-91465A134 3/8"-16 x 1" 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
- Enhanced torque transmission through external square drive design for secure installation in high-vibration environments
- Superior material reliability with ASTM Grade A steel construction ensuring consistent performance under load
- Optimized thread engagement with UNC coarse threading providing faster assembly and reduced cross-threading risk
- Precision manufacturing with Class 2A thread fit guaranteeing proper mating with standard nuts and components
- Full-length threading enables maximum grip range and adjustment flexibility in various material thicknesses
- Environmental compliance with RoHS 3 standards for safe use in regulated industrial applications
- Balanced strength characteristics with 60,000 psi tensile strength and Rockwell B69 hardness for durable performance without brittleness
Professional Applications & Engineering Value
This 3/8"-16 UNC square head screw delivers exceptional value in heavy-duty industrial applications where reliability matters most. The ASTM A307 Grade A steel construction provides optimal strength-to-weight ratio, while the coarse UNC threading ensures rapid installation in wood, metal, and construction materials. The external square drive design allows for high-torque application with standard wrench tools, preventing cam-out in demanding assembly scenarios. Particularly valuable in structural framing, machinery assembly, and equipment maintenance, these fully threaded fasteners maintain consistent holding power across their entire length. The Rockwell B69 hardness balances durability with machinability, reducing the risk of thread damage during repeated installations.
Specification Summary & Compliance
Manufactured to Unified Standard Class 2A thread tolerances for precise fit with standard components. Complies with ASTM A307 specifications for low carbon steel fasteners and RoHS 3 (2015/863/EU) environmental standards. Features 3/8"-16 UNC coarse threads with right-hand direction and full threading along the 1" length. Mechanical properties include 60,000 psi tensile strength and Rockwell B69 hardness consistent with Grade A classification requirements.
