S-90357A144 5/16"-18 x 3/8" Alloy Steel Ultra-Low-Profile Socket Head Screws
Alloy Steel Ultra-Low-Profile Socket Head 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 corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
- Ultra-low socket head profile allows installation in confined spaces without compromising drive integrity
- High tensile strength (140,000 psi) provides superior load-bearing capacity for demanding applications
- Rockwell C32 hardness maintains thread integrity and prevents stripping during repeated installations
- Fully threaded design delivers consistent clamping force along the entire fastener length
with standard tools for efficient installation and maintenance
Professional Applications & Engineering Value
Engineered for precision machinery and heavy-duty equipment, these socket head cap screws solve common industrial challenges through their optimized material and design. The black-oxide alloy steel construction provides superior corrosion protection in manufacturing environments where exposure to moisture and chemicals is common. The Class 3A UNC coarse threads ensure rapid assembly while maintaining vibration resistance in automotive, aerospace, and industrial machinery applications. The ultra-low profile head enables flush mounting in space-constrained designs, while the fully threaded configuration distributes stress evenly across the entire fastener length. With 140,000 psi tensile strength, these screws maintain structural integrity under extreme loads, making them ideal for critical joints in production equipment and structural frameworks.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread profile (5/16"-18). Length tolerance maintained at -0.005" to 0.005" for consistent installation performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial applications. Thread direction: right hand; Drive style: hex socket (5/32").
