S-90969A240 1/4"-20 Shoulder Screws
Shoulder 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 load-bearing capacity with 140,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance provided by black oxide finish, extending service life in demanding environments
- Precision thread engagement with Class 3A UNC threads ensuring secure fastening and vibration resistance
- Enhanced grip and torque application through knurled head and 5/32" hex drive for easy installation
- Space-saving design with ultra-low socket head profile ideal for compact assemblies
- Accurate component alignment with precisely machined 3/4" shoulder maintaining consistent positioning
- Environmental compliance assurance meeting RoHS 3 and REACH standards for sustainable manufacturing
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions where precision alignment and high-strength fastening are paramount. The Class 3A UNC thread system provides superior thread engagement for vibration-resistant assemblies in machinery, automation systems, and precision equipment. The black oxide finish offers enhanced corrosion protection in industrial environments, while the ultra-low socket head profile enables installation in space-constrained applications. The precisely machined 3/4" shoulder length ensures accurate component positioning in rotating assemblies, pivoting mechanisms, and bearing mounts. With 140,000 psi tensile strength and Rockwell C30 hardness, this shoulder screw maintains structural integrity under dynamic loads and repeated operational cycles.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit for precision UNC threading and tight tolerance control. The shoulder diameter maintains -0.004" to -0.002" tolerance while shoulder length is held to -0.005" to 0.005" precision. This shoulder screw complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring responsible manufacturing practices. The combination of alloy steel material properties and controlled manufacturing processes delivers consistent performance meeting industrial fastening requirements.
