S-92991A537 1/4"-20 x 1/2" ASME B18.3 Set Screws
Set Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with brass construction for long-lasting performance in harsh industrial environments
- Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant fastening in critical applications
- Optimized torque transmission through 1/8" hex drive design for secure installation without stripping
- Enhanced gripping power with cup tip design that bites into mating surfaces for superior holding strength
- Consistent dimensional accuracy with UNC coarse threads facilitating quick assembly and disassembly
- Durable mechanical properties with Rockwell B55 hardness providing excellent wear resistance
- Comprehensive regulatory compliance meeting ASME B18.3 standards and environmental regulations
Professional Applications & Engineering Value
This brass set screw delivers exceptional engineering value in applications where corrosion resistance and precision threading are critical. The UNC coarse thread profile with Class 3A thread fit ensures reliable performance in vibration-prone environments, while the cup tip design provides superior gripping action on shafts, collars, and pulleys. The 1/8" hex drive allows for efficient installation in confined spaces, making these headless set screws ideal for machinery, automotive components, and precision instruments where flush mounting is required. The combination of brass material and Rockwell B55 hardness offers optimal durability without sacrificing corrosion resistance, solving common industrial challenges with fastener degradation and maintenance requirements.
Specification Summary & Compliance
This 1/4"-20 UNC set screw features precise Class 3A thread fit tolerances with coarse thread spacing and right-hand thread direction. Manufactured to ASME B18.3 specifications with dimensional accuracy including 1/2" length and 0.25" thread diameter. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while maintaining high performance standards.
