S-94328A959 5/16"-18 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 durability with 140,000 psi tensile strength and Rockwell C30 hardness, ensuring long-term reliability in demanding applications.
- Superior corrosion resistance from the black oxide finish, extending service life in harsh industrial environments.
- Precise thread engagement with Class 3A fit, minimizing backlash and providing secure, vibration-resistant connections.
- Easy installation and removal thanks to the hex drive and knurled low-profile socket head, allowing for efficient assembly even in tight spaces.
- Accurate component alignment with a 3/8" shoulder diameter and controlled tolerances, reducing wear and improving machine performance.
- Broad compatibility with UNC coarse threading (5/16"-18), facilitating interchangeability and simplifying inventory management.
- Environmental compliance meeting RoHS 3 and REACH standards, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. Its black oxide finish provides a protective layer against rust and corrosion, essential for maintaining integrity in humid or chemically aggressive settings. The Class 3A thread fit and UNC coarse threads ensure rapid assembly with high clamping force, reducing the risk of loosening under dynamic loads. The 3/8" shoulder diameter with tight tolerances acts as a precise pivot or spacer, minimizing misalignment in rotating assemblies like conveyor systems, automotive jigs, and robotic arms. By combining high tensile strength with a low-profile socket head, it offers a compact yet robust fastening solution that enhances equipment lifespan and operational safety.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for superior precision. Key dimensional tolerances include a shoulder diameter of 3/8" (-0.004" to -0.002") and shoulder length of 1/4" (-0.005" to 0.005"). It is manufactured from alloy steel and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for global industrial use.
