S-8077A561 1/2"-13 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 component alignment ensured by the 2" shoulder with tight tolerances for reliable assembly fit
- High-load bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
- Secure installation and removal using the 3/8" hex drive and knurled head for enhanced grip and torque transmission
- Consistent thread engagement with Class 3A fit and coarse 1/2"-13 UNC threads for vibration resistance and quick assembly
- Long-term operational reliability backed by Rockwell B79 hardness and compliance with ASME B18.3 standards
- Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations for safe industrial use
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision equipment. The Black Oxide finish enhances corrosion resistance, extending service life in moist or chemically aggressive environments. Its 2" shoulder length with minimal tolerance variations ensures precise shaft positioning, reducing wear on rotating components and minimizing maintenance downtime. The coarse UNC threads and Class 3A fit provide excellent vibration resistance, preventing loosening in high-stress applications. Combined with a 70,000 psi tensile strength, this socket head shoulder screw delivers reliable performance in conveyor systems, robotic arms, and assembly jigs where precision and strength are paramount.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit and a shoulder diameter tolerance of -0.004" to -0.002". It complies with ASME B18.3 specifications for dimensional accuracy and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring regulatory compliance for global industrial use.
