S-91465A170 1/2"-13 x 2 1/4" 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
- High-strength steel construction provides reliable performance in demanding industrial environments with 60,000 psi tensile strength
- External square drive design ensures secure tool engagement and prevents stripping during high-torque applications
- Coarse UNC threading delivers faster installation and superior holding power in softer materials
- Partially threaded shank allows for precise clamping force control and prevents joint loosening
- ASTM Grade A certification guarantees consistent quality and mechanical properties for critical applications
- RoHS 3 compliance ensures environmental responsibility and global regulatory acceptance
- Unified Standard Class 2A thread fit provides reliable interchangeability and consistent assembly performance
Professional Applications & Engineering Value
This heavy-duty square head screw delivers exceptional value in industrial fastening applications where reliability is paramount. The ASTM Grade A steel construction combined with Rockwell B69 hardness provides optimal balance between strength and machinability, resisting deformation under load while maintaining installation efficiency. The 1/2"-13 UNC coarse thread configuration excels in wood, cast iron, and softer metals, reducing installation time while providing superior pull-out resistance. The external square drive offers positive engagement with standard wrenches, eliminating cam-out issues common in high-torque assembly operations. These partially threaded screws are particularly valuable in construction, machinery assembly, and structural applications where precise clamping control is essential for long-term joint integrity.
Specification Summary & Compliance
This square head screw features precise Unified Standard Class 2A thread fit tolerances ensuring reliable interchangeability. Manufactured to ASTM A307 specifications for low-strength fasteners, it maintains consistent dimensional accuracy across all critical parameters. The product is fully RoHS 3 (2015/863/EU) compliant and meets international environmental standards. With 1/2"-13 UNC coarse threading and 2 1/4" length, this fastener delivers predictable performance in standardized assembly applications requiring dependable mechanical fastening solutions.
