S-8077A621 5/16"-18 ASME B18.3 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh environments and extended service life.
- Exceptional mechanical strength offering 70,000 PSI tensile and 35,000 PSI shear strength for reliable performance under high stress.
- Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies.
- Enhanced grip and control from the knurled socket head, allowing for easy installation and removal even in slippery conditions.
- Accurate shoulder positioning with controlled diameter and length tolerances for consistent alignment in machinery and fixtures.
- Broad regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use.
- Optimized for high-torque applications featuring a 3/16" hex drive and standard socket head for efficient driving with common tools.
Professional Applications & Engineering Value
This shoulder screw is engineered to address common challenges in precision assemblies, such as misalignment and component wear. The 316 stainless steel construction, combined with a black oxide finish, provides excellent resistance to corrosion and chemicals, making it suitable for demanding sectors like automotive, aerospace, and marine equipment. The UNC coarse thread and Class 3A fit ensure quick, reliable fastening with high vibration resistance, while the knurled head enhances grip during manual or automated installation. Its robust shoulder design acts as a precise pivot or spacer, reducing wear on moving parts and maintaining alignment in rotating machinery, jigs, and conveyor systems, thereby minimizing downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw adheres to strict dimensional standards, including a Class 3A thread fit for precise engagement, and tolerances for shoulder diameter (-0.004" to -0.002") and length (-0.005" to 0.005"). It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for industrial applications.
