S-90251A176 8-32 x 1/4" 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 316 Stainless Steel construction, ideal for harsh environments and chemical exposure
- Exceptional vibration resistance provided by the permanent nylon patch thread locker, preventing loosening under dynamic loads
- High-temperature reliability with thread locker performance maintained from -50°F to 250°F
- Precise, secure fastening ensured by UNC Class 3A thread fit for tight tolerances and minimal backlash
- Durable, wear-resistant performance from Rockwell B80 hardness, resisting deformation under high clamp loads
- Easy installation and removal with 5/64" hex drive, allowing standard tool use in confined spaces
- Positive, non-slip grip from the cup point tip that bites into shafts for permanent component positioning
Professional Applications & Engineering Value
This 8-32 UNC Class 3A set screw delivers critical reliability in demanding industrial applications where vibration, corrosion, and temperature extremes compromise fastener integrity. The 316 Stainless Steel material provides exceptional resistance to chlorides and acidic environments, making it suitable for marine, chemical processing, and food equipment. The nylon patch thread locker eliminates the need for separate locking washers or adhesives, providing permanent resistance to rotational loosening in machinery, motor assemblies, and precision instruments. Its headless design with hex drive allows flush mounting in pulleys, collars, and gears where protruding fasteners are impractical, while the coarse UNC thread ensures rapid assembly and high pull-out strength in softer materials.
Specification Summary & Compliance
This set screw features 8-32 UNC Class 3A threads with coarse spacing, ensuring precise fit and maximum engagement strength. Manufactured to ASME B18.3 specifications for dimensional accuracy and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted hazardous substances. The thread diameter of 0.164" and 1/4" length provide standardized dimensions for interchangeability in industrial components.
