S-90969A420 3/8"-16 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
- Precision alignment and smooth rotation ensured by the 1/2" shoulder diameter with tight tolerance control
- Superior corrosion resistance through black oxide finish, extending service life in demanding environments
- Secure installation and removal with 1/4" hex drive and knurled head preventing tool slippage
- Space-saving design featuring ultra-low socket head profile for compact assembly requirements
- Consistent thread engagement with Class 3A thread fit providing reliable fastening in precision equipment
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for global industrial use
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions where precise component alignment and rotational movement are paramount. The 3/8"-16 UNC coarse thread with Class 3A fit ensures rapid assembly while maintaining vibration resistance in machinery, automation systems, and precision instruments. The black oxide finish provides essential corrosion protection for industrial environments, while the 1" shoulder length acts as a precise pivot or spacer in rotating assemblies. The ultra-low socket head with knurled texture enables secure tool engagement in confined spaces, making these shoulder screws ideal for manufacturing equipment, robotic arms, and conveyor systems where reliability and precision are non-negotiable.
Specification Summary & Compliance
This precision shoulder screw features Class 3A thread fit per UNC standards with 5/8" thread length and coarse thread spacing. Critical dimensions include shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 1" (tolerance: -0.005" to 0.005"). Manufactured from alloy steel with Rockwell C30 hardness and 140,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial applications.
