S-97768A423 3/8"-16 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
- High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance in heavy-duty applications.
- Precise shoulder diameter and length with tight tolerances (±0.005") for accurate alignment and reduced assembly errors.
- Class 3A thread fit provides superior thread engagement and vibration resistance in demanding conditions.
- Knurled socket head design offers improved grip and easy installation with standard hex tools.
- Compliance with ASME B18.3 standards guarantees consistent quality and interchangeability.
- RoHS 3 and REACH compliant for environmentally responsible and safe use in global markets.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and heavy equipment. The 1/2" shoulder diameter with minimal tolerance variations ensures exact component positioning, reducing wear and misalignment in rotating assemblies. Made from 18-8 stainless steel with a black oxide finish, it resists corrosion and extends service life in moist or chemical-exposed settings. The knurled socket head enhances tool grip during high-torque installations, while the Class 3A thread fit and coarse UNC threads provide secure fastening under dynamic loads. Ideal for use in robotics, conveyor systems, and industrial fixtures, this screw delivers reliable performance where precision and strength are paramount.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC thread with Class 3A fit for high precision, a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002"), and shoulder length of 7/8" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards.
