S-91259A168 8-32 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
- Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in high-stress applications
- Superior corrosion resistance provided by the black oxide finish, extending service life in demanding industrial environments
- Precision Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
- Optimized shoulder design with 3/16" diameter and 1" length provides accurate component alignment and rotational bearing surfaces
- Enhanced durability through Rockwell C32 hardness and alloy steel construction for long-term reliability
- Easy installation and removal with standard hex socket drive design requiring minimal clearance space
- Full regulatory compliance meeting ASTM A574 specifications with RoHS 3 and REACH environmental standards
Professional Applications & Engineering Value
These alloy steel shoulder screws with 8-32 UNC coarse thread deliver critical engineering solutions across multiple industrial sectors. The precision-ground shoulder diameter maintains exact component alignment in machinery, while the black oxide finish provides essential corrosion protection in manufacturing environments. The Class 3A thread fit ensures vibration-resistant fastening in automotive assemblies, robotics, and precision equipment. With 140,000 psi tensile strength, these socket head shoulder screws withstand extreme mechanical stresses in heavy-duty applications, reducing maintenance frequency and downtime. The hex drive design allows for efficient installation in confined spaces, making them ideal for complex assemblies requiring both rotational and axial precision.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with 8-32 UNC coarse thread specification and maintains tight dimensional tolerances for shoulder diameter (-0.004" to -0.002") and length (-0.005" to 0.005"). Manufactured in compliance with ASTM A574 specification for alloy steel socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for hazardous substance restrictions.
