S-91251A548 1/4"-20 x 1 3/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket 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 corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
- Exceptional tensile strength of 170,000 psi prevents fastener failure under extreme loads and vibration
- Precision Class 3A thread fit ensures secure, reliable fastening with minimal risk of cross-threading
- Optimized torque transmission through 3/16" hex drive design prevents tool slippage and head stripping
- Enhanced material durability with Rockwell C37 hardness maintains structural integrity under repeated stress
- Versatile partial threading allows for both clamping and alignment functions in complex assemblies
- Industry-standard compliance with ASTM A574 guarantees consistent quality and performance specifications
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver critical performance where standard fasteners fail. The coarse UNRC thread design provides superior engagement in soft materials and rapid assembly, while the 1" minimum thread length ensures sufficient grip in thick-section components. Engineered for heavy machinery, automotive systems, and industrial equipment, the hex drive socket configuration enables high-torque installation in confined spaces. The partially threaded shank design prevents binding in clearance holes while maintaining precise alignment. With 170,000 psi tensile strength, these fasteners withstand dynamic loads and vibration without compromising joint integrity, making them ideal for critical structural applications requiring reliable, long-term performance.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread tolerances for superior fit and consistent performance. Complies with ASTM A574 specification for alloy steel socket head cap screws. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features UNRC coarse threads in 1/4"-20 configuration with right-hand thread direction. System of measurement: Inch. Thread rod type: Partially threaded with 1" minimum thread length.
