S-97768A344 5/16"-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 and black oxide finish, ideal for harsh industrial environments.
- Precise alignment and secure positioning thanks to the 3/8" shoulder with tight diameter and length tolerances (±0.005").
- High-strength fastening performance delivering 70,000 psi tensile and 35,000 psi shear strength for demanding applications.
- Reliable, fine-thread engagement with 5/16"-24 UNF Class 3A fit, ensuring vibration resistance and reduced loosening.
- Easy installation and removal using a standard 3/16" hex drive and knurled socket head for improved grip.
- Consistent quality and compliance meeting ASME B18.3 standards, RoHS 3, and REACH regulations for global use.
- Enhanced durability with Rockwell B55 hardness, providing excellent wear resistance over repeated use.
Professional Applications & Engineering Value
This high-precision shoulder screw is engineered to solve critical alignment and stability challenges in machinery, automation, and precision assemblies. The 18-8 stainless steel material, combined with a black oxide finish, offers reliable corrosion resistance, while the 3/8" shoulder length with minimal tolerances ensures exact component positioning—eliminating misalignment and reducing wear. The 5/16"-24 UNF fine threads with Class 3A fit provide secure, vibration-resistant fastening in dynamic environments. Ideal for use in industrial equipment, pivoting mechanisms, and precision instruments, this socket head shoulder screw delivers long-term reliability and reduces maintenance needs.
Specification Summary & Compliance
This shoulder screw features a 5/16"-24 UNF thread with Class 3A fit for high precision, a shoulder diameter of 3/8" with tolerance from -0.004" to -0.002", and shoulder length of 1/8" with ±0.005" tolerance. It is manufactured in compliance with ASME B18.3 specifications and is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets international environmental and safety standards.
