S-91251A842 4-48 x 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
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications
- Superior corrosion resistance provided by black-oxide coating extends service life in demanding environments
- Precise Class 3A thread fit delivers superior engagement and vibration resistance in critical assemblies
- Fine UNF threading offers enhanced clamping force and improved adjustment precision
- Hardened alloy steel construction (Rockwell C37) maintains dimensional stability under heavy loads
- Standard hex socket drive allows for high-torque installation in confined spaces
- Full threading along 3/4" length provides maximum fastening flexibility and uniform stress distribution
Professional Applications & Engineering Value
Engineered for precision machinery and heavy-duty equipment, these 4-48 UNF socket head cap screws solve critical fastening challenges in aerospace, automotive, and industrial manufacturing. The black-oxide alloy steel construction combined with Class 3A thread tolerance ensures zero-backlash performance in vibration-prone applications. The fine thread configuration provides superior resistance to loosening while the fully threaded design allows for adjustable positioning in complex assemblies. These hex drive screws are particularly valuable in applications requiring high clamp load maintenance and repeated disassembly cycles, making them ideal for jigs, fixtures, and precision instrument manufacturing where dimensional stability is paramount.
Specification Summary & Compliance
This socket head cap screw features precision 4-48 UNF fine threads with Class 3A fit for superior dimensional accuracy. Manufactured to ASTM A574 specification for alloy steel socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict chemical substance control.
