S-95362A441 1/2"-13 x 3 1/2" ASME B18.2.1, SAE J429, ASTM A354BD, MS90728-121 Mil. Spec. High-Strength Steel Hex Head Screws
Mil. Spec. High-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 tensile strength of 150,000 psi ensures reliable performance in the most demanding industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the zinc yellow-chromate plating protects against rust and extends service life in harsh environments.
- High-strength Grade 8 classification and Rockwell C33 hardness provide excellent durability and resistance to wear and deformation.
- Coarse UNC threading and Class 2A thread fit enable quick assembly, easy alignment, and secure fastening in a variety of materials.
- Partially threaded design offers a non-threaded shank for precise clamping and shear strength where needed.
- External hex head allows for high-torque installation with common tools, ensuring a tight and secure fit.
- Compliance with major standards including ASME B18.2.1, SAE J429, and ASTM A354BD guarantees consistent quality and interchangeability.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for heavy-duty applications where failure is not an option. Its steel construction and zinc yellow-chromate plating provide a robust barrier against corrosion, making it ideal for outdoor machinery, construction equipment, and automotive assemblies exposed to moisture and chemicals. The 1/2"-13 UNC coarse thread and partial threading design ensure strong grip and resistance to vibrational loosening, while the external hex drive head facilitates efficient installation with standard wrenches. By meeting ASME B18.2.1, SAE J429, and ASTM A354BD specifications, this fastener delivers reliable performance in structural, mechanical, and industrial systems, reducing maintenance needs and downtime.
Specification Summary & Compliance
This screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy and ease of assembly. It complies with ASME B18.2.1, SAE J429, ASTM A354BD, and MS90728-121 manufacturing standards, ensuring consistent quality and performance. The product is also REACH (EC 1907/2006) compliant, adhering to environmental and safety regulations for hazardous substances.
