S-94128A173 5/16"-18 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 Thread Precision - Class 3A thread fit ensures superior engagement and vibration resistance in high-stress assemblies.
- Optimized Shoulder Design - 3/8" shoulder diameter with precise fit tolerance provides accurate alignment and reduces component wear.
- Enhanced Durability - Alloy steel construction with Rockwell C32 hardness offers excellent strength and long-term reliability.
- Simplified Installation - Slotted drive design allows for quick assembly with standard tools while maintaining headless profile.
- Regulatory Compliance - Meets RoHS 3 and REACH standards for safe use in regulated industrial environments.
- Coarse Thread Advantage - 5/16"-18 UNC thread spacing facilitates faster installation and better performance in softer materials.
- Precision Shoulder Control - Tight shoulder length tolerance (0" to 0.005") ensures consistent positioning in critical applications.
Professional Applications & Engineering Value
This precision shoulder screw solves critical alignment challenges in industrial machinery, automation systems, and precision instruments. The alloy steel construction with Rockwell C32 hardness provides the necessary strength to withstand repetitive loads and operational stresses. The 3/8" shoulder diameter with precise fit tolerance acts as a reliable locating feature, eliminating play between components and reducing wear on mating parts. The Class 3A thread fit and UNC coarse thread pattern ensure secure fastening in demanding applications where vibration resistance is crucial. Headless design with slotted drive allows for flush mounting in space-constrained assemblies while maintaining accessibility for maintenance.
Specification Summary & Compliance
This shoulder screw features 5/16"-18 UNC coarse threads with Class 3A fit for precision engagement. The shoulder maintains a diameter of 3/8" with tolerance of -0.001" to 0" and length of 1" with tolerance of 0" to 0.005" for precise fit applications. Manufactured from alloy steel with Rockwell C32 hardness, the component complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for industrial use across regulated markets.
