S-90044A289 2-56 x 2" 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, ideal for harsh industrial environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions
- Precise Class 3A thread fit provides secure, vibration-resistant fastening in critical assemblies
- Partially threaded design allows for optimal clamp force distribution and easier alignment
- Rockwell C37 hardness maintains structural integrity through repeated installation cycles
- Coarse UNC threads enable quick assembly and reduced cross-threading risks
- Compact 5/64" hex drive facilitates access in confined spaces while maximizing torque transfer
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these black-oxide alloy steel socket head cap screws deliver exceptional reliability in machinery, automotive, and precision equipment assemblies. The UNC coarse thread configuration combined with Class 3A thread fit ensures rapid installation while maintaining vibration resistance in high-cycle operations. The partially threaded design provides controlled clamping force distribution, preventing joint loosening under dynamic loads. With 170,000 psi tensile strength and Rockwell C37 hardness, these fasteners withstand extreme mechanical stresses while the black-oxide surface treatment offers enhanced corrosion protection in challenging environments. The 5/64" hex drive socket enables efficient torque application in space-constrained applications, making them ideal for precision engineering and maintenance operations.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread tolerances for precision fit. Features UNC coarse threads with 2-56 thread size and 5/8" minimum thread length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Right-hand thread direction with standard socket head profile ensures compatibility with industry-standard installation tools and procedures.
