S-90337A168 4-40 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 diameter and length tolerances, minimizing assembly play
- 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 5/64" hex drive for confined spaces and sleek assemblies
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening in right-hand applications
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use
- Durable surface protection via passivation enhancing wear resistance and longevity
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and corrosion challenges in precision assemblies. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to oxidation and chemical exposure, making it suitable for electronics, machinery, and automotive components. The low-profile socket head with a 5/64" hex drive allows for easy installation in tight spaces, while the precisely machined shoulder ensures accurate positioning of moving parts, reducing vibration and wear. Its Class 2A thread fit and coarse UNC threads facilitate quick assembly and disassembly, enhancing maintenance efficiency in industrial shoulder screw applications where reliability and compliance with environmental standards are paramount.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Shoulder dimensions include a diameter of 1/8" (-0.001" to 0" tolerance) and length of 3/8" (0" to 0.002" tolerance), ensuring precise fit. Manufactured from 18-8 stainless steel with a passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting safe and sustainable industrial use.
