S-91251A228 3-48 x 1/8" 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 ensures reliable performance under high-stress applications
- Precision Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Rockwell C37 hardness maintains structural integrity and prevents stripping during repeated installations
- Standard hex drive design with 5/64" size enables secure tool engagement and consistent torque application
- Coarse UNC threading facilitates faster installation and reduces cross-threading risks in production environments
- Full threading along 1/8" length offers maximum adjustability and holding power in compact spaces
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver critical performance advantages in precision engineering applications where space constraints and vibration resistance are paramount. The combination of Class 3A thread fit and coarse UNC threading ensures rapid assembly while maintaining exceptional clamp load retention in machinery, automotive components, and electronic enclosures. The fully threaded design provides uniform stress distribution, preventing joint loosening under dynamic loads. With 170,000 psi tensile strength and Rockwell C37 hardness, these fasteners withstand extreme operational stresses while the black-oxide surface treatment resists corrosion in industrial atmospheres, making them ideal for OEM manufacturing and maintenance applications requiring reliable, high-strength fastening solutions.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread tolerance for precision fit. Features 3-48 UNC coarse threads with right-hand orientation and standard socket head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. System of measurement: Inch; Drive size: 5/64"; Length: 1/8"; Head diameter: 0.161".
