S-90318A303 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 and passivated finish, ideal for harsh chemical and marine environments.
- Precise component alignment due to the exact 1/2" shoulder length with tight tolerances, reducing assembly errors.
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under load.
- Easy installation and removal with the hex socket drive and ultra-low head profile, saving time in confined spaces.
- Consistent thread engagement ensured by Class 2A UNC coarse threads, minimizing cross-threading risks.
- Durability in demanding applications supported by Rockwell B70 hardness and RoHS/REACH compliance for long-term use.
- Secure fastening in dynamic conditions with right-hand coarse threads providing strong hold in vibrating machinery.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical alignment and corrosion challenges in industrial settings. The precise shoulder diameter and length ensure accurate positioning of moving parts in assemblies like rotating shafts, pulleys, and gears, reducing wear and maintenance downtime. With its UNC coarse threads and Class 2A fit, it offers quick, reliable fastening in high-vibration applications such as automotive, aerospace, and machinery. The passivated finish enhances resistance to chemicals and moisture, making it suitable for food processing, marine, and pharmaceutical equipment where hygiene and durability are paramount. Combined with a hex socket drive and ultra-low head, it allows for efficient installation in tight spaces, streamlining production and reducing labor costs.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent precision. Dimensions include a shoulder diameter of 3/16" (tolerance: -0.001" to 0") and shoulder length of 1/2" (tolerance: 0" to 0.002"), ensuring exact alignment. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental standards for global industrial use.
