S-90311A139 8-32 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 environments and extended service life.
- Vibration-resistant locking provided by the integrated nylon patch, ensuring fasteners stay secure from -50° to 250° F without loosening.
- High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding mechanical applications.
- Precise alignment and smooth rotation due to the standard shoulder fit and knurled head for improved grip during installation.
- Easy installation and removal with a 3/32" hex socket drive, allowing for efficient assembly in confined spaces.
- Reliable thread engagement with Class 3A UNC coarse threads, offering consistent fit and reduced risk of cross-threading.
- Compliance with environmental standards, meeting RoHS 3 and REACH regulations for safe use in various industrial sectors.
Professional Applications & Engineering Value
This 8-32 UNC shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining alignment in rotating machinery and securing components under dynamic loads. The 316 stainless steel material provides excellent resistance to chemicals and moisture, reducing maintenance in industrial settings like marine equipment or food processing. The nylon patch thread locker effectively prevents back-off caused by vibrations, common in automotive or aerospace applications, while the knurled head and hex socket drive facilitate quick, tool-friendly installation. With a Class 3A thread fit and robust shoulder design, it ensures dimensional accuracy and durability, making it a reliable choice for OEMs and maintenance teams seeking long-term fastening solutions.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads for precise tolerances, and a shoulder diameter tolerance of -0.004" to -0.002" for consistent performance. It adheres to industry standards, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it meets environmental and safety regulations for industrial use.
