S-99894A123 1/4"-20 x 1 1/2" MS90725-12 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
- Grade 5 steel construction provides 120,000 psi tensile strength for reliable performance in demanding applications
- Cadmium plating offers superior corrosion resistance, extending service life in harsh environments
- Class 2A UNC coarse threads ensure easy installation and secure fastening in various materials
- External hex head design allows for high torque application with standard tools
- Partially threaded shank provides optimal grip strength while reducing material stress
- Rockwell C25 hardness maintains structural integrity under heavy loads and vibration
- 1½" length with ¾" minimum thread engagement delivers versatile fastening solutions across multiple thicknesses
Professional Applications & Engineering Value
These Grade 5 steel hex head screws are engineered to solve critical fastening challenges in industrial environments. The cadmium plated finish provides essential corrosion protection for machinery, construction equipment, and outdoor applications where environmental exposure is a concern. The UNC coarse thread pattern combined with Class 2A tolerance ensures quick installation and reliable performance in assembled components subject to vibration and dynamic loads. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening while the external hex drive accommodates high torque requirements using standard wrenches. These features make them ideal for heavy-duty fastening in construction, manufacturing, and equipment maintenance where 120,000 psi tensile strength is essential for structural integrity.
Specification Summary & Compliance
This 1/4"-20 hex head screw features Class 2A thread fit with UNC coarse threading and partial threading configuration. Manufactured to meet MS90725-12 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The fastener maintains dimensional accuracy per inch system requirements with Rockwell C25 hardness verification and Grade 5 strength classification for consistent performance across industrial applications.
