S-91259A122 5/8"-11 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
- Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in demanding applications
- Superior corrosion resistance provided by the black oxide finish, extending service life in harsh industrial environments
- Precision thread fit with Class 3A tolerance ensuring secure fastening and vibration resistance in critical assemblies
- Enhanced grip and torque application through the knurled socket head with 3/8" hex drive for secure tool engagement
- Accurate shoulder positioning with controlled diameter and length tolerances for precise component alignment
- High durability from Rockwell C32 hardened alloy steel construction, maintaining integrity under repeated stress
- Industry compliance assurance meeting ASME B18.3 standards and environmental regulations for global manufacturing use
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions for precision machinery and industrial equipment. The 5/8"-11 UNC coarse thread with Class 3A fit provides exceptional holding power in high-vibration environments, while the precisely machined shoulder ensures accurate component alignment in rotating assemblies and bearing applications. The black oxide finish offers superior corrosion protection, making it ideal for automotive, aerospace, and manufacturing equipment exposed to harsh conditions. With its knurled socket head and 3/8" hex drive, installation torque is efficiently transferred without slippage, reducing assembly time and improving workplace safety. These shoulder screws are engineered to maintain dimensional stability under extreme loads, preventing misalignment in precision mechanisms.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit and controlled shoulder diameter tolerance (-0.004" to -0.002") and length tolerance (-0.005" to 0.005"). Complies with ASME B18.3 specifications where identified as ASTM A574, and meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards.
