S-91251A700 9/16"-18 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 tensile strength of 170,000 psi ensures reliable performance in demanding applications
- Precision Class 3A thread fit provides excellent engagement and vibration resistance
- Black-oxide surface treatment offers enhanced corrosion protection for extended service life
- Hex socket drive design allows for high torque application and secure installation in confined spaces
- Fine UNF thread profile delivers superior holding power and improved load distribution
- Full thread coverage along the 2" length enables flexible positioning and maximum grip
- Alloy steel construction with Rockwell C37 hardness maintains dimensional stability under stress
Professional Applications & Engineering Value
Engineered for industrial applications where reliability is non-negotiable, these socket head cap screws address critical engineering challenges in heavy machinery, automotive assemblies, and precision equipment. The black-oxide alloy steel construction combined with Class 3A UNF fine threads provides exceptional resistance to loosening under vibration and thermal cycling. The hex drive system enables high torque installation in space-constrained environments, while the fully threaded design ensures maximum clamping force distribution. These fasteners solve common industrial pain points including joint failure, corrosion-induced degradation, and installation accessibility issues, making them ideal for applications requiring maximum reliability and long-term performance.
Specification Summary & Compliance
This socket head cap screw features precision 9/16-18 UNF fine threads with Class 3A fit for superior dimensional accuracy and engagement. Manufactured to ASTM A574 specification with Rockwell C37 hardness and 170,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries. The black-oxide surface treatment provides additional corrosion protection while maintaining dimensional integrity.
