S-92991A126 1/4"-28 x 3/16" 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
- Corrosion-resistant brass construction ensures long-term reliability in demanding environments without rust or degradation
- Precision Class 3A thread fit delivers superior engagement and vibration resistance for critical assembly applications
- 1/8" hex drive design provides secure tool engagement and high torque transmission without stripping
- Rockwell B55 hardness rating maintains structural integrity under repeated adjustments and mechanical stress
- Cup tip configuration creates positive seating and prevents component slippage in shaft collars and couplings
- Full compliance with ASME B18.3 specifications guarantees dimensional accuracy and interchangeability
- RoHS 3 and REACH environmental compliance meets international regulatory standards for hazardous substance restrictions
Professional Applications & Engineering Value
This brass set screw with 1/4"-28 UNF fine threads addresses critical challenges in precision assembly where corrosion resistance and dimensional stability are paramount. The headless design and cup tip provide reliable axial positioning in rotating components while preventing surface damage. Engineers specify this Class 3A thread fit fastener for applications requiring minimal backlash and superior vibration resistance in machinery, electrical enclosures, and marine equipment. The combination of Rockwell B55 hardness and fine thread spacing ensures maintained clamping force in high-cycle applications, while the 1/8" hex drive accommodates standard tools for efficient installation in confined spaces.
Specification Summary & Compliance
This set screw features precision 1/4"-28 UNF fine threads with Class 3A fit tolerances per ASME standards. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substance restrictions.
