S-90807A129 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 Durability - Alloy steel construction with Rockwell C32 hardness and 140,000 psi tensile strength ensures long-lasting performance in demanding applications
- Superior Corrosion Resistance - Black oxide finish provides enhanced protection against rust and environmental degradation
- Precision Alignment - Class 3A thread fit and standard shoulder fit guarantee exact positioning and secure fastening
- Easy Installation & Removal - Hex socket drive with 5/32" drive size and knurled head texture offers excellent grip and torque transmission
- Reliable Shoulder Performance - 2" shoulder length with tight tolerances provides stable bearing surfaces for rotating components
- Industry Compliance - Meets RoHS 3 and REACH environmental regulations for safe industrial use
- Versatile Thread Design - 5/16"-18 UNC coarse right-hand threads ensure quick assembly and strong holding power
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions for precision machinery and industrial equipment. The 2" shoulder length with controlled diameter tolerance provides exact alignment for rotating assemblies, bearings, and pivoting mechanisms, eliminating the need for additional spacing components. The black oxide finish significantly enhances corrosion resistance in challenging environments, while the Class 3A thread fit ensures vibration-resistant fastening in high-stress applications. The hex socket drive with knurled head texture allows for high-torque installation in confined spaces, making it ideal for automotive, manufacturing, and precision instrument applications where reliability and dimensional accuracy are paramount.
Specification Summary & Compliance
This precision shoulder screw features 5/16"-18 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. The shoulder maintains a diameter of 5/16" with tolerance of -0.004" to -0.002" and length of 2" with tolerance of -0.005" to 0.005". Manufactured from high-strength alloy steel with Rockwell C32 hardness and 140,000 psi tensile strength. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
