S-94383A210 1/4"-20 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
- Enhanced corrosion resistance with black oxide finish, ideal for demanding industrial environments
- Superior load-bearing capacity from alloy steel construction, supporting up to 140,000 psi tensile strength
- Precise thread engagement with Class 3A fit and UNC coarse thread for reliable fastening in high-vibration applications
- Secure installation and removal using a standard 5/32" hex drive and knurled head for improved grip
- Accurate component alignment with a precisely machined shoulder diameter and length tolerances
- Long-term durability backed by Rockwell C32 hardness and 84,000 psi minimum shear strength
- Global compliance assurance meeting ASME B18.3, RoHS 3, and REACH regulations for safe, reliable use
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and strength requirements in precision assemblies. The alloy steel material, combined with a black oxide finish, provides excellent resistance to wear and environmental factors, reducing maintenance in machinery and automation systems. The 1/4-20 UNC coarse thread ensures quick assembly and reliable performance under dynamic loads, while the 7/16" shoulder length offers consistent spacing for rotating parts like bearings and pulleys. Its Class 3A thread fit and tight shoulder tolerances minimize play, enhancing operational accuracy in applications such as robotics, conveyor systems, and industrial equipment where misalignment can lead to premature failure.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for precise engagement. Key dimensional attributes include a shoulder diameter of 5/16" (tolerance: -0.004" to -0.002") and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for global industrial use.
