S-91465A125 5/16"-18 x 2" ASTM A307 Square Head Screws
Square Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
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 cam-out during high-torque applications
- Coarse UNC threading delivers faster installation and superior resistance to vibration loosening
- Partially threaded shank allows for precise clamping force control and secure component positioning
- Class 2A thread fit guarantees consistent installation quality and interchangeability across standard applications
- ASTM A307 Grade A compliance ensures material quality and mechanical properties for general purpose fastening
- RoHS 3 environmental compliance meets international regulatory standards for hazardous substance restrictions
Professional Applications & Engineering Value
These 5/16"-18 UNC square head screws deliver exceptional value in industrial assembly and maintenance applications where reliable fastening is critical. 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 external square drive offers superior torque transmission compared to standard hex drives, making these partially threaded fasteners ideal for machinery assembly, structural connections, and equipment maintenance where vibration resistance and precise clamping are essential. The coarse thread configuration ensures rapid installation in various materials while the 2" length provides ample engagement for secure connections in medium-duty applications.
Specification Summary & Compliance
Manufactured to Unified Standard Class 2A thread tolerances with UNC coarse threading (5/16"-18) and right-hand thread direction. Complies with ASTM A307 specifications for low carbon steel fasteners and meets RoHS 3 (2015/863/EU) environmental standards. Features include 13/64" head height, 1/2" head width, and 7/8" minimum thread length on a 2" overall fastener within the inch measurement system.
