S-90669A353 1/4"-28 x 3/8" 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 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise, vibration-resistant fastening thanks to Class 3A thread fit and UNF fine threads
- Enhanced component protection with soft brass tip that prevents damage to mating surfaces
- Reliable installation torque enabled by 1/8" hex drive and headless design for flush mounting
- Consistent mechanical performance ensured by Rockwell B80 hardness and right-hand thread direction
- Broad regulatory compliance meeting ASME B18.3 specifications and RoHS/REACH environmental standards
- Optimized for compact assemblies with 3/8" length and 1/4"-28 thread size
Professional Applications & Engineering Value
This 1/4"-28 UNF Class 3A set screw delivers exceptional engineering value in precision mechanical assemblies where vibration resistance and component protection are critical. The 18-8 stainless steel construction provides excellent corrosion resistance for demanding industrial environments, while the fine UNF threads and Class 3A fit ensure secure, precise fastening in applications requiring minimal thread clearance. The integrated brass tip prevents damage to shafts, gears, and other precision components, making it ideal for adjustment mechanisms, positioning systems, and rotary equipment. The headless hex drive design allows for flush installation in confined spaces, while maintaining reliable torque transmission during assembly and maintenance operations.
Specification Summary & Compliance
This set screw features Class 3A thread fit with 1/4"-28 UNF fine threads and right-hand thread direction, manufactured to exacting dimensional standards. The product complies with ASME B18.3 specifications for set screws and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Additional specifications include a 1/8" hex drive, 3/8" length, and Rockwell B80 hardness rating for consistent mechanical performance.
