S-8077A338 5/16"-18 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 and black oxide finish, ideal for harsh environments and extended service life
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high stress
- Precise Class 3A thread fit ensures secure, vibration-resistant connections in critical assemblies
- Knurled socket head provides enhanced grip and easy installation with standard hex tools
- Accurate shoulder dimensions with tight tolerances for consistent alignment and smooth rotational movement
- Compliance with ASME B18.3 guarantees dimensional consistency and interchangeability in industrial applications
- RoHS 3 and REACH compliance ensures environmental safety and regulatory acceptance in global markets
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in precision machinery, automotive systems, and industrial equipment. The Class 3A thread fit and coarse UNC thread provide superior resistance to loosening under vibration, while the precisely machined shoulder ensures accurate component alignment and reduces wear. The combination of high tensile strength and excellent corrosion resistance makes it ideal for demanding environments where reliability and durability are paramount. Its knurled socket head allows for quick, secure installation with standard hex drive tools, streamlining assembly processes in manufacturing and maintenance operations.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC coarse thread with Class 3A fit for precise engagement. Shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005" for consistent performance. Manufactured in compliance with ASME B18.3 specifications, it is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards.
