S-90311A116 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 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure.
- Permanent vibration resistance provided by the nylon patch thread locker, maintaining secure fastening from -50° to 250° F without loosening.
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under heavy loads.
- Precise shoulder positioning with a 1/8" diameter and 1/2" length shoulder, offering accurate alignment for machinery and assembly applications.
- Exceptional thread accuracy with Class 3A fit and 4-40 UNC coarse thread, enabling easy installation and consistent engagement.
- Easy installation and removal using a standard 5/64" hex drive socket head, reducing assembly time and tool wear.
- Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automotive assemblies, and electronic enclosures where vibration resistance and corrosion protection are paramount. The nylon patch thread locker secures fasteners permanently in high-stress environments, preventing operational failures. With a Class 3A thread fit and UNC coarse thread, it ensures quick, reliable installation in automated production lines. The precisely machined shoulder provides stable bearing surfaces for rotating parts, reducing wear and maintenance costs. Ideal for applications demanding high tensile strength and dimensional accuracy, this fastener enhances equipment longevity and performance in demanding industrial settings.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, with a shoulder diameter of 1/8" (tolerance: -0.004" to -0.002") and shoulder length of 1/2" (tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for industrial use.
