S-91286A182 5/16"-24 x 1" 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
- Exceptional load-bearing capacity with a 150,000 PSI tensile strength, ideal for high-stress structural connections.
- Superior corrosion resistance provided by the zinc-flake coating, extending service life in harsh industrial environments.
- Reliable, fine-thread engagement with the UNF 5/16"-24 thread and Class 2A fit, ensuring vibration resistance and secure fastening.
- High durability and wear resistance from the Grade 8 steel and Rockwell C33 hardness, minimizing thread deformation.
- Easy installation and high torque capability with the external hex drive and 1/2" head width, compatible with standard tools.
- Full-length threading for maximum grip and adjustability across the entire 1" length of the fastener.
- Compliance with major industrial standards including ASME B18.2.1 and SAE J429, guaranteeing interchangeability and quality.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to solve critical fastening challenges in heavy machinery, automotive assemblies, and construction equipment where joint integrity is non-negotiable. The high-strength steel and UNF fine thread design provide superior resistance to loosening under dynamic loads and vibrations, a common failure point in industrial applications. The zinc-flake coated finish offers robust protection against corrosion, significantly reducing maintenance needs and downtime in exposed or chemically aggressive environments. Its fully threaded 1" length and external hex drive ensure quick, secure installations with standard tools, making it a reliable choice for OEMs and MRO professionals seeking durable, high-performance industrial screws.
Specification Summary & Compliance
This fastener features a 5/16"-24 UNF fine thread with a Class 2A thread fit for precise dimensional accuracy and consistent performance. It is manufactured in compliance with ASME B18.2.1 and SAE J429 specifications for Grade 8 hex head screws. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial components.
