S-91465A293 1"-8 x 9" 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
- Superior torque transmission with external square drive design for reliable installation in high-torque industrial applications
- Exceptional durability provided by ASTM Grade A steel construction with 60,000 PSI tensile strength for long-lasting performance
- Optimized thread engagement through UNC coarse threading that resists vibration loosening and simplifies alignment
- Precision manufacturing ensures Unified Standard Class 2A thread fit for consistent mating with nuts and threaded components
- Enhanced material integrity with Rockwell B69 hardness rating that maintains structural stability under load
- Regulatory compliance assurance with RoHS 3 (2015/863/EU) compliance for environmentally responsible sourcing
- Versatile partial threading allows for both secure fastening and smooth shank sections where needed
Professional Applications & Engineering Value
This 1"-8 UNC Square Head Screw delivers critical performance in demanding industrial environments where high-torque applications require reliable fastening solutions. The ASTM Grade A steel construction provides essential 60,000 PSI tensile strength for structural connections in construction, heavy machinery, and infrastructure projects. The external square drive design enables maximum torque application without cam-out, while the coarse UNC threading ensures rapid installation and superior resistance to vibration-induced loosening. With a 9" length and 2.5" minimum thread length, this partially threaded fastener offers flexibility for applications requiring both threaded engagement and smooth shank sections. The combination of Rockwell B69 hardness and ASTM A307 specifications guarantees consistent performance in load-bearing assemblies where reliability cannot be compromised.
Specification Summary & Compliance
This square head screw maintains Unified Standard Class 2A thread fit tolerances with 1"-8 UNC coarse threading and right-hand thread direction. Manufactured to ASTM A307 specifications with ASTM Grade A classification, it delivers 60,000 PSI tensile strength and Rockwell B69 hardness. The fastener is RoHS 3 (2015/863/EU) compliant and follows inch system measurements with a total length of 9" and minimum thread length of 2.5".
