S-97768A407 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
- Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under high stress.
- Precise alignment and location provided by the 1/2" shoulder diameter with tight tolerances, reducing assembly errors.
- Secure, non-slip fastening thanks to the knurled socket head and 1/4" hex drive, allowing for high-torque installation.
- Consistent thread engagement with Class 3A UNC coarse threads, offering excellent vibration resistance and durability.
- Broad compliance and safety meeting ASME B18.3 standards and being RoHS 3 and REACH compliant for global industrial use.
- Enhanced durability from Rockwell B55 hardness, providing long service life in demanding applications.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery. The 18-8 stainless steel material, combined with a black oxide finish, provides excellent resistance to corrosion and wear, making it suitable for automotive, aerospace, and manufacturing equipment where exposure to moisture and chemicals is common. The 1/2" shoulder diameter ensures precise component positioning, reducing misalignment and wear in pivoting or rotating assemblies. With its Class 3A thread fit and coarse UNC threads, it delivers reliable performance in high-vibration environments, preventing loosening and maintaining structural integrity. Ideal for use in jigs, fixtures, and conveyor systems, this screw enhances operational efficiency and reduces maintenance downtime.
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" with tight tolerances (-0.004" to -0.002"), and a knurled socket head for secure driving. It is manufactured in compliance with ASME B18.3 standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets rigorous safety and environmental regulations for industrial applications.
