S-91381A667 1/2"-13 x 3/4" 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 surface protection with brass soft tip that prevents damage to mating components during installation and adjustment
- Exceptional holding power achieved through Class 3A thread fit precision and coarse UNC threading for maximum engagement
- Enhanced durability with Rockwell C28 hardness rating that maintains performance under repeated use and high stress
- Corrosion-resistant black-oxide finish on alloy steel construction for extended service life in demanding environments
- Secure installation access via headless hex drive design that allows flush mounting in confined spaces
- Industry-standard compliance with ASME B18.3 specifications ensuring reliable performance and interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance for safe use across global markets
Professional Applications & Engineering Value
This 1/2"-13 UNC set screw delivers critical engineering solutions for industrial applications requiring precise component positioning and secure fastening. The black-oxide alloy steel construction combined with Rockwell C28 hardness provides exceptional resistance to wear and deformation, making it ideal for machinery, automotive assemblies, and power transmission systems where vibration resistance is paramount. The brass soft tip eliminates marring on shafts and precision components while maintaining clamping force, solving common surface damage issues in adjustable mechanisms. The headless hex drive design enables flush installation where protruding fasteners are impractical, while the Class 3A thread fit ensures consistent performance in high-precision applications requiring minimal backlash.
Specification Summary & Compliance
This set screw features 1/2"-13 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy and engagement. Manufacturing complies with ASME B18.3 standards for dimensional consistency and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility and global market acceptance.
