S-90251A531 1/4"-20 x 3/16" 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
- Vibration-resistant locking with permanent Nylon patch that maintains secure fastening under dynamic loads
- Superior corrosion resistance from 18-8 stainless steel construction for extended service life in harsh environments
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable installation and consistent clamping force
- High-temperature performance with locking capability maintained across -70° to 250°F operational range
- Optimized drive transfer through hex drive design providing maximum torque application without stripping
- Enhanced material durability with Rockwell B80 hardness offering excellent resistance to wear and deformation
- Secure component positioning via cup tip design that digs into shafts for permanent location control
Professional Applications & Engineering Value
This 18-8 stainless steel set screw with Nylon patch locking technology addresses critical vibration-induced loosening in industrial machinery, automotive components, and precision equipment. The Class 3A UNC coarse threads provide superior thread engagement while the hex drive ensures maximum torque transfer during installation. Engineered for permanent positioning applications, the cup tip creates positive biting action on shafts and collars, preventing rotational slippage in high-stress environments. The combination of stainless steel material and temperature-resistant thread locker delivers reliable performance across diverse operating conditions, making it ideal for OEM assemblies and maintenance applications requiring vibration-resistant fastening solutions.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC coarse threads (1/4"-20). Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features Rockwell B80 hardness and Nylon patch thread locker technology certified for temperature range of -70° to 250°F.
