S-90782A121 M8 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 black oxide finish, extending service life in harsh industrial environments
- Exceptional mechanical strength with 140,000 psi tensile strength and Rockwell C32 hardness for heavy-duty applications
- Precise component alignment through controlled 12mm shoulder length with tight 0-0.25mm tolerance
- Reliable thread engagement with Class 6g metric thread fit ensuring consistent assembly performance
- Secure installation and removal via knurled socket head with 4mm hex drive, preventing tool slippage
- Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements
- Optimized for high-volume assembly with coarse 1.25mm thread pitch enabling faster installation cycles
Professional Applications & Engineering Value
This M8 shoulder screw delivers critical engineering solutions for precision machinery and industrial equipment. The alloy steel construction with black oxide finish provides essential corrosion protection while maintaining dimensional stability under load. The precision-ground 8mm shoulder diameter with controlled tolerances ensures perfect alignment in bearings, linkages, and rotating assemblies, eliminating play and reducing wear. The Class 6g thread fit and coarse thread pitch combine to provide reliable fastening in high-vibration environments common in automotive, automation, and heavy machinery applications. The knurled socket head design allows for secure tool engagement during installation, particularly valuable in confined spaces where standard fasteners might be challenging to manipulate.
Specification Summary & Compliance
Manufactured to exacting metric standards with Class 6g thread fit per ISO specifications. Shoulder diameter tolerance maintained at -0.072 to -0.01 mm with shoulder length tolerance of 0 to 0.25 mm for precision alignment applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets and restricted substance requirements.
