S-91286A501 3/4"-16 x 2 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 150,000 PSI tensile strength and Grade 8 classification for reliable performance in demanding applications
- Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh industrial environments
- Precise thread engagement with UNF fine threading and Class 2A fit ensuring secure fastening and vibration resistance
- High durability from Rockwell C33 hardness maintaining structural integrity under heavy loads and repeated use
- Easy installation and removal with external hex drive and 1 1/8" head width for standard tool compatibility
- Full thread coverage along the 2 1/2" length providing maximum grip and distribution of clamping force
- Regulatory compliance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for quality assurance and environmental safety
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where failure is not an option. The steel construction with Rockwell C33 hardness provides exceptional resistance to deformation under extreme loads, while the UNF fine threading offers superior vibration resistance compared to coarse threads. The zinc-flake coating creates a robust barrier against corrosion, making these fully threaded fasteners ideal for outdoor applications, manufacturing plants, and automotive assemblies exposed to harsh conditions. With 150,000 PSI tensile strength, these screws maintain joint integrity in high-stress applications, preventing costly downtime and maintenance issues in industrial settings.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 3/4"-16 UNF fine threading in right-hand direction. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Features include 2 1/2" length, 1 1/8" head width, and external hex drive. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications.
