S-94361A329 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
- Enhanced Durability & Corrosion Resistance - Black Oxide finish provides superior protection against rust and wear in demanding industrial environments
- Precision Alignment & Stability - Class 3A thread fit ensures exact mating with components for vibration-resistant assemblies
- Exceptional Strength Under Load - 140,000 psi tensile strength and Rockwell C32 hardness withstand high-stress applications
- Secure Grip & Easy Installation - Knurled socket head with 5/32" hex drive prevents tool slippage during torque application
- Accurate Component Positioning - 7/8" shoulder length with tight tolerances maintains precise alignment in machinery assemblies
- Reliable Fine Thread Engagement - 1/4"-28 UNF threads provide superior holding power in thin materials and critical joints
- Compliance Confidence - Meets RoHS 3 and REACH environmental regulations for global manufacturing applications
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions where precise component alignment and reliable fastening are paramount. The 7/8" shoulder length with controlled diameter tolerance provides exact bearing surfaces for rotating components, eliminating misalignment in machinery assemblies. The Class 3A UNF fine threads offer superior resistance to vibration loosening while maintaining high clamp loads in demanding applications. The Black Oxide finish enhances corrosion resistance without dimensional changes, making it ideal for precision equipment, automotive components, and industrial machinery where environmental exposure is a concern. The combination of 140,000 psi tensile strength and Rockwell C32 hardness ensures long-term performance in high-stress applications without deformation or failure.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit for superior engagement and UNF fine thread specifications. Shoulder diameter tolerance maintained at -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" for exact positioning requirements. Compliant with RoHS 3 (2015/863/EU) with exemption 6(a) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility in global manufacturing applications.
