S-8077A543 5/8"-11 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 with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Precise alignment and secure pivoting ensured by the 3 1/4" shoulder length with tight tolerances for consistent performance
- High-strength reliability with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
- Easy installation and removal using a standard 3/8" hex drive and knurled head for improved grip
- Accurate thread engagement with Class 3A UNC coarse threads providing superior fit and vibration resistance
- Durable wear resistance from Rockwell B79 hardness, extending service life in high-stress assemblies
- Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards (RoHS 3, REACH)
Professional Applications & Engineering Value
This 5/8"-11 UNC shoulder screw in 316 stainless steel with black oxide finish addresses critical engineering challenges in precision machinery and heavy-duty equipment. The Class 3A thread fit and precisely machined shoulder (3 1/4" length) provide stable rotational support in assemblies requiring exact alignment, such as conveyor systems, robotic arms, and automotive fixtures. The coarse UNC thread enhances assembly speed while resisting loosening under vibration, and the knurled socket head allows secure tool engagement in confined spaces. With 70,000 psi tensile strength, it reliably handles dynamic loads in manufacturing, packaging, and material handling applications where component failure is not an option.
Specification Summary & Compliance
This shoulder screw maintains Class 3A thread fit per UNC standards with a 5/8"-11 thread size and 0.625" diameter. The shoulder diameter (3/4") and length (3 1/4") are manufactured to tight tolerances for precision assembly. It conforms to ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial use.
