S-90129A127 1/2"-13 x 1 1/4" 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 black-coated steel construction for extended service life in harsh environments
- High-strength performance with Grade 5 rating and 120,000 psi tensile strength for demanding industrial applications
- Superior load distribution through the integrated flange design, eliminating the need for separate washers
- Reliable coarse threading (UNC) ensures quick assembly and reduced cross-threading risks in high-vibration settings
- Precision Class 2A thread fit guarantees consistent engagement and secure fastening in machinery and structural components
- Optimized external hex drive provides high torque transmission and easy installation with standard tools
- Full compliance with SAE J429/IFI 111 standards and environmental regulations including RoHS 3 & REACH
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 5 hex head screw delivers critical performance where reliability matters most. The black corrosion-resistant coating protects against oxidation and chemical exposure in manufacturing, construction, and outdoor equipment. Its UNC coarse threading and Class 2A fit prevent loosening under vibration while enabling rapid assembly in steel framing, machinery bases, and automotive components. The integrated flange distributes clamping force evenly across surfaces, reducing point stress and maintaining joint integrity. With full threading along the 1-1/4" length, it provides maximum grip range for variable material thicknesses in structural connections and equipment maintenance.
Specification Summary & Compliance
This fastener maintains Class 2A thread tolerance per UNC standards with 1/2"-13 coarse threading and fully threaded design. Manufacturing complies with IFI 111/SAE J429 specifications for Grade 5 mechanical properties, including 120,000 psi tensile strength and Rockwell C22 hardness. The product is verified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial distribution.
