S-99894A429 1/2"-13 x 2 1/2" MS90725-117 Mil. Spec. Medium-Strength Steel Hex Head Screws
Mil. Spec. Medium-Strength Steel 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 load-bearing capacity with 120,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through cadmium plating, extending service life in demanding environments
- Optimized thread engagement with Class 2A thread fit ensuring precise, secure connections every time
- Enhanced durability from Rockwell C25 hardness, providing excellent resistance to wear and deformation
- Quick installation with external hex drive design allowing for efficient assembly using standard tools
- Versatile partial threading enabling both clamping and alignment functions in various applications
- Regulatory compliance meeting MS90725-117 specifications and RoHS 3 standards for quality assurance
Professional Applications & Engineering Value
This Grade 5 steel hex head screw delivers critical engineering solutions for industrial and construction applications where reliability under heavy loads is paramount. The combination of 120,000 psi tensile strength and Rockwell C25 hardness ensures structural integrity in demanding environments, while the cadmium plating provides essential corrosion protection against environmental factors. The 1/2"-13 UNC coarse thread design offers superior grip in various materials, and the partial threading allows for both secure fastening and precise alignment. These industrial hex screws are engineered to withstand vibration, shock loads, and prolonged stress, making them ideal for machinery assembly, structural steel connections, and heavy equipment applications where failure is not an option.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit according to UNC standards, ensuring proper clearance and engagement. The fastener maintains dimensional accuracy with 2 1/2" length and 1 1/4" minimum thread length. Manufacturing compliance includes meeting MS90725-117 specifications and RoHS 3 (2015/863/EU) compliance for environmental safety. The Grade 5 classification guarantees consistent mechanical properties and performance reliability across production batches.
