S-95289A045 5/16"-18 x 1/2" ASME B18.3 Set Screws
Set 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 long-term reliability.
- Exceptional holding power ensured by the Class 3A thread fit, providing tight, secure fastening with minimal backlash.
- Enhanced grip and anti-loosening from the extended tip design, which bites deeper into the mating surface.
- High-strength durability with a Rockwell B80 hardness, resisting wear and deformation under heavy loads.
- Easy installation and removal using a standard 5/32" hex key, simplifying maintenance in confined spaces.
- Reliable performance in high-vibration applications due to the coarse UNC thread and headless design.
- Compliance with major industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
Professional Applications & Engineering Value
This 5/16"-18 UNC set screw is engineered to address common industrial challenges such as component slippage and vibration-induced loosening. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive environments, including outdoor machinery, food processing equipment, and marine components. The extended tip offers increased surface contact, creating a more secure lock on shafts, collars, and pulleys. Combined with the Class 3A thread fit and coarse thread design, it ensures rapid assembly and reliable performance in high-stress scenarios, reducing downtime and maintenance costs for engineers and OEMs.
Specification Summary & Compliance
This set screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for precise dimensional accuracy. The UNC coarse thread (5/16"-18) and right-hand direction are standard for industrial use. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. Tip dimensions include a length of 0.164" (tolerance: -0.005" to 0") and diameter of 0.203" (tolerance: -0.008" to 0"), guaranteeing consistent performance.
