S-94361A129 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 load-bearing capacity with 140,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through black oxide finish, extending service life in demanding industrial environments
- Precision thread engagement with Class 3A fit UNF fine threads ensuring secure fastening and vibration resistance
- Enhanced grip and handling thanks to knurled socket head design for easy installation and removal
- Accurate component alignment with 2" shoulder length maintaining precise positioning in assemblies
- Consistent dimensional stability through alloy steel construction with Rockwell C32 hardness
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This alloy steel shoulder screw with 1/4"-28 UNF fine threads and Class 3A fit addresses critical alignment and durability challenges in precision machinery. The 2" shoulder length provides exact component spacing in rotating assemblies, jigs, and fixtures, while the black oxide finish protects against corrosion in industrial environments. The socket head with hex drive and knurled texture ensures secure tool engagement during installation, preventing slippage in confined spaces. With 140,000 psi tensile strength and Rockwell C32 hardness, this fastener maintains structural integrity under dynamic loads, making it ideal for automotive, aerospace, and manufacturing applications where precision and reliability are paramount.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit for superior engagement and UNF fine thread specification (1/4"-28). The shoulder features precise dimensional tolerances: diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance for industrial applications.
