S-92949A434 12-28 x 1/2" Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Precise thread engagement with Class 3A UNF fine threads ensuring reliable, vibration-resistant connections
- High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding applications
- Easy installation and removal with 5/32" hex drive design, reducing assembly time and tool slippage
- Fully threaded shank offers maximum grip length and consistent fastening along the entire length
- Low-profile rounded button head creates a smooth finish while maintaining structural integrity
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance
Professional Applications & Engineering Value
Engineered for precision assembly in industrial equipment, electronics, and machinery, these 12-28 UNF Class 3A rounded head screws address critical fastening challenges. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, extending service life in humid or chemical-exposed environments. With fine thread spacing and Class 3A thread fit, these screws deliver superior vibration resistance and minimal backlash, crucial for maintaining alignment in dynamic systems. The hex drive configuration allows for high-torque application without cam-out, while the rounded button head design reduces snagging risks in confined spaces. These features make them ideal for applications requiring reliable, repeatable disassembly and reassembly.
Specification Summary & Compliance
This fastener meets UNF thread standards with Class 3A precision tolerance for consistent threading performance. Dimensions include 1/2" length, 0.216" thread diameter, and standard right-hand thread direction. Mechanical properties include Rockwell B55 hardness and 70,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
