S-90337A478 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Precise component alignment through exact shoulder dimensions (3/8" diameter, 5/16" length) with tight manufacturing tolerances
- Enhanced durability with 70,000 psi tensile strength and Rockwell B55 hardness for long-lasting performance under load
- Space-saving low profile design with socket head and 5/32" hex drive for applications with limited clearance
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening in industrial assemblies
- Compliance with environmental regulations including RoHS 3 and REACH for global market acceptance
- Optimized installation efficiency with right-hand coarse threads and hex drive for quick, secure assembly
Professional Applications & Engineering Value
This precision shoulder screw solves critical alignment challenges in machinery, automation systems, and precision instruments where component positioning is paramount. The 18-8 stainless steel construction with passivated finish provides exceptional corrosion resistance in demanding environments, while the low profile socket head design allows installation in confined spaces. The precisely machined shoulder with tight diameter and length tolerances ensures accurate bearing surfaces and rotational control, eliminating misalignment issues in industrial assemblies. With 70,000 psi tensile strength and Class 2A UNC threads, this fastener maintains structural integrity under vibration and load, making it ideal for precision applications requiring reliable, repeatable performance.
Specification Summary & Compliance
This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder dimensions (3/8" diameter ±0.001", 5/16" length +0.002"/-0"). Manufactured from 18-8 stainless steel with passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety. The coarse thread spacing and right-hand thread direction follow industry standards for reliable fastening performance in industrial applications.
