S-94361A397 5/8"-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 load-bearing capacity with 140,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance thanks to the black oxide finish, extending service life in demanding industrial environments
- Precision alignment and smooth rotation ensured by the Class 3A thread fit and 2" shoulder length with tight tolerances
- Secure installation and removal facilitated by the knurled socket head with 3/8" hex drive, preventing tool slippage
- Enhanced durability from Rockwell C32 hardness alloy steel construction, resisting wear and deformation
- Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
- Optimized for fine-thread applications using 5/8"-18 UNF threads for improved vibration resistance and sealing
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and rotational stability challenges in machinery assembly. The alloy steel construction with black oxide finish provides robust corrosion protection, ideal for automotive, aerospace, and heavy equipment where moisture and chemicals are present. The 2" shoulder length with precise diameter tolerances ensures accurate component positioning, reducing wear on moving parts. Combined with Class 3A UNF fine threads, it offers superior resistance to loosening under vibration, making it perfect for precision instruments, pivoting mechanisms, and conveyor systems that demand reliable, long-term performance without frequent maintenance.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with 5/8"-18 UNF fine threads and right-hand direction. The shoulder diameter is 3/4" with a tolerance of -0.004" to -0.002", and shoulder length is 2" with -0.005" to 0.005" tolerance. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) regulations, ensuring environmental safety in industrial applications.
