S-90298A817 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 18-8 Stainless Steel construction, ideal for harsh environments and reducing replacement frequency.
- Enhanced assembly precision due to Class 3A thread fit and tight shoulder tolerances, ensuring consistent alignment in mechanical systems.
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength, providing reliable performance under stress.
- Secure and easy installation featuring a knurled socket head with 5/16" hex drive, preventing tool slippage and speeding up assembly.
- Long shoulder for accurate pivoting with a 6" shoulder length, offering stable rotational support in machinery and linkages.
- Compliance with industry standards including ASME B18.3, ensuring interchangeability and quality in professional applications.
- Environmental and safety adherence through RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices.
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to address critical challenges in precision assemblies, such as misalignment and wear in rotating components. The 1/2"-13 UNC coarse thread and Class 3A fit provide secure fastening with minimal backlash, while the 6" shoulder length with tight diameter and length tolerances ensures exact positioning in linkages, pivots, and bearing mounts. Made from durable stainless steel, it resists corrosion in industrial settings, reducing maintenance downtime. Commonly used in machinery, automotive, and automation systems, this socket head shoulder screw delivers reliable performance where high strength and dimensional accuracy are paramount, supported by a knurled head for improved grip during installation.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior engagement and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 specifications for consistency and reliability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial use.
