S-8077A265 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 with black oxide finish, ideal for harsh industrial environments
- Precise component alignment with Class 3A thread fit and standard shoulder fit for reliable positioning
- High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Enhanced grip and torque transmission through knurled socket head with 7/8" hex drive
- Dimensional stability with tight shoulder diameter tolerance (-0.004" to -0.002") and shoulder length tolerance (-0.005" to 0.005")
- Industry compliance assurance meeting ASME B18.3 specifications and environmental standards (RoHS 3, REACH)
- Optimized for heavy-duty use featuring Rockwell B79 hardness and UNC coarse thread for secure fastening
Professional Applications & Engineering Value
This black oxide 316 stainless steel shoulder screw addresses critical engineering challenges in industrial machinery, automation systems, and precision equipment. The Class 3A thread fit ensures vibration-resistant connections while the 1 1/2" shoulder diameter provides exact component spacing and rotational stability. The knurled socket head with 7/8" hex drive enables high-torque installation without slippage, particularly valuable in maintenance-intensive environments. With 70,000 psi tensile strength and superior corrosion resistance, this fastener maintains structural integrity in chemical processing, marine applications, and outdoor equipment where moisture and corrosive agents are present. The 2 1/2" shoulder length accommodates multiple component layers while the UNC coarse thread facilitates quick assembly in production lines.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and precise shoulder diameter tolerance of -0.004" to -0.002". Features UNC coarse thread (1 1/8"-7) with right-hand direction and standard shoulder fit. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Inch measurement system throughout with Rockwell B79 hardness rating.
