S-95235A529 1/4"-20 x 1/4" ASME B18.3, ASTM F912 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
- Permanent vibration resistance with nylon patch thread locker that maintains integrity up to 250°F
- Superior thread engagement through Class 3A external thread fit for precise, secure fastening in demanding applications
- Exceptional durability from alloy steel construction with Rockwell C45 hardness for long service life
- Reliable installation torque with 1/8" hex drive preventing cam-out and ensuring consistent clamping force
- Enhanced grip on shafts and components thanks to the extended tip design that increases surface contact
- Broad industrial compatibility with UNC coarse threads facilitating quick assembly and disassembly
- Compliance with global standards including ASME B18.3 for dimensional consistency and reliability
Professional Applications & Engineering Value
This 1/4"-20 UNC set screw delivers critical performance in machinery, automotive, and assembly systems where vibration resistance and positional stability are paramount. The alloy steel material, hardened to Rockwell C45, withstands repetitive stress and environmental exposure, while the nylon patch thread locker eliminates the need for additional adhesives—securing components permanently without loosening. Its extended tip concentrates pressure on a smaller area, improving grip on rotating shafts and precision parts. Engineered with Class 3A thread fit and coarse UNC threads, it ensures rapid, accurate installation in high-volume production environments, reducing downtime and maintenance costs.
Specification Summary & Compliance
This set screw adheres to ASME B18.3 specifications, with UNC coarse threads in a Class 3A external thread fit for tight tolerances. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety. The thread locker is rated for temperatures up to 250°F, and the extended tip features precise dimensional controls (tip diameter: 0.156" with tolerance -0.007" to 0; tip length: 0.067" with tolerance -0.008" to 0) for consistent performance.
