S-90129A112 1/4"-20 x 3/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws
Medium-Strength Grade 5 Steel Flanged Hex Head 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
- Exceptional corrosion resistance with a durable black coating, extending service life in harsh environments
- High tensile strength of 120,000 PSI (Grade 5) ensures reliable performance under heavy loads and vibration
- Flanged head design eliminates the need for a separate washer, providing a larger bearing surface and faster installation
- Fully threaded UNC coarse spacing allows for rapid assembly and superior grip in a wide range of materials
- Precision Class 2A thread fit guarantees consistent, secure fastening with reduced risk of cross-threading
- Rockwell C22 hardness provides excellent wear resistance and durability for long-term use
- Compliance with SAE J429, RoHS 3, and REACH ensures material quality and environmental safety for global industrial applications
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to solve critical fastening challenges in demanding industrial settings. The black corrosion-resistant coating on steel provides a robust barrier against rust and degradation, making it ideal for outdoor equipment, automotive assemblies, and machinery exposed to moisture or chemicals. The combination of a flanged head and external hex drive offers superior clamp load distribution and high-torque installation capability, preventing loosening under dynamic stresses. Its 1/4"-20 UNC coarse thread ensures quick engagement and reliable holding power in metals, plastics, and composite materials, reducing assembly time while maintaining joint integrity in heavy-duty applications.
Specification Summary & Compliance
This fastener features a 1/4"-20 UNC thread with a Class 2A fit for consistent dimensional accuracy. It is manufactured to meet IFI 111 / SAE J429 specifications for Grade 5 mechanical properties, ensuring a tensile strength of 120,000 PSI and Rockwell C22 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and safe for use in regulated markets.
