S-8077A261 1 1/8"-7 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 from 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
- Enhanced durability and wear resistance with black oxide finish that provides added surface protection and reduces galling
- Precise component alignment with 1.5" shoulder length maintaining consistent spacing in assemblies
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure torque transmission through knurled socket head with 7/8" hex drive preventing tool slippage
- Reliable thread engagement with Class 3A fit 1-1/8"-7 UNC coarse threads ensuring vibration resistance
- Industry compliance assurance meeting ASME B18.3 standards with RoHS 3 and REACH environmental regulations
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish addresses critical engineering challenges in industrial machinery and precision equipment. The 1.5" shoulder length provides exact pivot points and bearing surfaces in rotating assemblies, while the Class 3A thread fit maintains tight tolerances in high-vibration environments. The knurled socket head with 7/8" hex drive ensures secure tool engagement during installation, preventing stripping in high-torque applications. With exceptional corrosion resistance from 316 stainless steel and the added protection of black oxide coating, this shoulder screw delivers long-term reliability in manufacturing equipment, conveyor systems, and precision instruments where dimensional stability and chemical resistance are paramount.
Specification Summary & Compliance
Manufactured to exact ASME B18.3 specifications with Class 3A thread fit for superior precision. Features 1-1/8"-7 UNC coarse threads with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell B79 hardness, 70,000 psi tensile strength, and 35,000 psi minimum shear strength.
