S-91264A110 8-32 ASME B18.3, ASTM A574 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
- Vibration-resistant locking with nylon pellet thread locker maintains secure fastening in temperatures from -50° to 250°F
- Exceptional load-bearing capacity from 140,000 psi tensile strength and 84,000 psi shear strength for demanding applications
- Precision alignment through Class 3A thread fit and controlled shoulder diameter tolerances for accurate component positioning
- Superior corrosion resistance with black oxide finish protecting the alloy steel in harsh industrial environments
- Enhanced grip and torque transmission from knurled socket head with hex drive design
- Reliable dimensional stability with Rockwell C32 hardness ensuring consistent performance under stress
- Broad regulatory compliance meeting ASME B18.3 standards and RoHS/REACH environmental requirements
Professional Applications & Engineering Value
This 8-32 UNC shoulder screw delivers critical engineering solutions where precise alignment and vibration resistance are paramount. The alloy steel construction with black oxide finish provides durability in mechanical assemblies, while the 3/16" shoulder length with tight tolerances ensures accurate spacing in rotating machinery and precision equipment. The nylon pellet thread locker prevents loosening in high-vibration environments like automotive subsystems and industrial automation. With coarse UNC threads and Class 3A fit, installation is optimized for production efficiency while maintaining the dimensional accuracy required in aerospace components and electronic enclosures.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior precision. The shoulder diameter maintains -0.004" to -0.002" tolerance with shoulder length controlled within -0.005" to 0.005". Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, meeting ASTM A574 material requirements for reliable performance in regulated industrial applications.
