S-94967A547 3/8"-16 x 1 1/4" ASME B18.2.1, ASTM B117, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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 corrosion resistance with black protective coating, ideal for harsh industrial environments and outdoor applications.
- High tensile strength of 120,000 psi ensures reliable performance under heavy loads and demanding mechanical stress.
- Grade 5 classification and Rockwell C25 hardness provide superior durability and resistance to wear and deformation.
- Coarse UNC thread pattern with Class 2A fit offers quick assembly, easy engagement, and reduced cross-threading risks.
- Fully threaded design maximizes grip length and load distribution across the entire fastener.
- External hex drive and standard hex head allow for high-torque installation using common wrenches and sockets.
- Compliance with major standards including ASME B18.2.1, ASTM B117, and SAE J429 guarantees consistent quality and interoperability.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address common industrial challenges such as vibration loosening, corrosion degradation, and structural failure. The black corrosion-resistant coated steel construction provides long-term protection against rust and chemical exposure, making it suitable for machinery, construction, and automotive assemblies. Its coarse UNC thread ensures rapid installation even in poorly aligned or dirty holes, while the fully threaded design enhances clamping force in thick materials. With a 120,000 psi tensile strength and external hex drive, it supports high-stress applications where reliability and ease of maintenance are critical.
Specification Summary & Compliance
This fastener features a 3/8"-16 UNC thread with Class 2A tolerance for precise fit and interchangeability. It adheres to ASME B18.2.1, ASTM B117, and SAE J429 manufacturing specifications, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries and environmental standards.
