S-94361A121 1/4"-28 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 tensile strength of 140,000 psi for reliable performance in high-stress industrial applications
- Superior corrosion resistance with black oxide finish, extending service life in demanding environments
- Precision Class 3A thread fit ensures secure, vibration-resistant connections with minimal backlash
- Knurled socket head design provides enhanced grip for easier installation and removal with standard hex tools
- Rockwell C32 hardness rating delivers excellent wear resistance and long-term durability
- Fine UNF thread profile offers better load distribution and improved sealing capabilities
- Comprehensive regulatory compliance with RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
This alloy steel shoulder screw with black oxide finish addresses critical engineering challenges in precision assembly applications. The Class 3A thread fit and UNF fine threading provide exceptional dimensional stability for applications requiring minimal clearance and precise alignment, such as in machinery components, automotive assemblies, and precision instruments. The knurled socket head with 5/32" hex drive ensures secure tool engagement during installation, reducing the risk of stripping while the shoulder diameter maintains accurate component positioning. With 140,000 psi tensile strength and Rockwell C32 hardness, this shoulder screw withstands heavy rotational and axial loads while resisting wear in continuous operation environments.
Specification Summary & Compliance
This precision shoulder screw features 1/4"-28 UNF fine threads with Class 3A thread fit for superior dimensional accuracy. The shoulder diameter maintains tight tolerances of -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005". Manufactured from high-strength alloy steel with black oxide surface treatment, the component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial applications worldwide.
