S-92620A756 1/2"-20 x 6" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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
- Maximum Load-Bearing Capacity – Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress applications.
- Superior Corrosion Resistance – Zinc yellow-chromate plating provides long-lasting protection against rust and environmental degradation.
- Precise Thread Engagement – UNF fine threading and Class 2A fit offer excellent vibration resistance and secure fastening.
- High Durability – Rockwell C33 hardness maintains structural integrity under repeated loads and harsh conditions.
- Full Thread Coverage – 6" fully threaded design allows for adjustable grip length and uniform stress distribution.
- Easy Installation & Removal – External hex drive and 3/4" head width enable quick, tool-friendly assembly.
- Industry Compliance – Meets ASME B18.2.1 and SAE J429 standards for consistent quality and interchangeability.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in machinery assembly, structural framing, and equipment manufacturing. The UNF fine thread design enhances fatigue resistance by minimizing stress concentration, while the zinc yellow-chromate finish prevents galvanic corrosion in humid or chemically aggressive environments. With full 1/2"-20 threading and Class 2A tolerance, it ensures precise alignment and reliable clamping force in high-vibration settings such as automotive, construction, and agricultural machinery. The external hex drive facilitates efficient installation with standard tools, reducing assembly time without compromising 150,000 psi tensile strength.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit per UNF standards, ensuring dimensional accuracy and interchangeability. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications, guaranteeing consistent mechanical properties and performance. The zinc yellow-chromate plating meets RoHS and REACH environmental directives, providing corrosion protection without hazardous substances. All dimensions—including 6" length, 1/2"-20 thread size, and 3/4" head width—are precision-machined for reliable integration into certified industrial systems.
