S-90337A479 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 enabled by the 3/8" shoulder diameter with tight tolerances (±0.002") for reliable assembly
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Space-saving low-profile design with socket head and hex drive for installations with limited clearance
- Consistent thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
- Environmental compliance meeting RoHS 3 and REACH standards for safe, sustainable manufacturing
- Easy installation and removal using standard 5/32" hex tools, reducing assembly time and maintenance efforts
Professional Applications & Engineering Value
This 5/16"-18 low profile socket head shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional corrosion resistance, making it suitable for automotive, aerospace, and electronic assembly applications where exposure to moisture and chemicals is common. The precise shoulder diameter and Class 2A thread fit ensure accurate positioning of moving parts, reducing wear and preventing misalignment in rotating assemblies. Its low-profile head and hex drive allow for compact designs without compromising on 70,000 psi tensile strength, offering reliable performance in high-stress environments while maintaining ease of serviceability.
Specification Summary & Compliance
This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent engagement. The shoulder diameter maintains a tolerance of -0.001" to 0", and shoulder length tolerance is 0" to 0.002" for precise assembly. Manufactured from 18-8 stainless steel with a passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for industrial use.
