S-97832A133 3/8"-24 ASME B18.3 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, ideal for harsh environments and extended service life
- Precise component alignment ensured by the 1-1/4" shoulder with tight diameter tolerance for reliable assembly
- High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure, non-slip fastening provided by the knurled socket head and 1/4" hex drive for easy installation
- Reliable thread engagement with Class 3A UNF fine thread for vibration resistance and superior holding power
- Industry-standard compliance with ASME B18.3, ensuring interchangeability and consistent quality
- Environmental regulation adherence through RoHS 3 and REACH compliance for safe, sustainable use
Professional Applications & Engineering Value
This shoulder screw is engineered to solve critical alignment and pivot point challenges in precision machinery. The 18-8 Stainless Steel material provides excellent corrosion resistance, making it suitable for food processing, marine, and chemical exposure applications where durability is paramount. The 1-1/4" shoulder length with controlled tolerances acts as a precise shaft for rotating components like gears, bearings, and linkages, eliminating the need for additional bushings. The UNF fine thread (3/8"-24) with Class 3A fit maintains clamp load under vibration, while the knurled socket head ensures tool engagement doesn't slip during high-torque assembly. This combination delivers reliable performance in automated equipment, conveyor systems, and precision instruments.
Specification Summary & Compliance
This shoulder screw features a 3/8"-24 UNF fine thread with Class 3A fit for precision engagement. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 1-1/4" with a tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications, it ensures dimensional consistency. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental and safety regulations for industrial components.
