S-90409A123 5/16"-18 x 1" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 Steel Flanged 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 high-stress industrial applications
- Superior hardness rating of Rockwell C32 provides excellent wear resistance and long service life
- External hex drive design enables efficient torque transmission and secure installation with standard tools
- Flanged construction eliminates the need for separate washers while providing superior load distribution
- Fully threaded body offers maximum grip length and consistent holding power throughout the fastener
- Class 2A thread fit ensures smooth assembly while maintaining proper clearance for reliable performance
- Coarse UNC threading provides rapid installation and superior resistance to vibration loosening
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The steel construction combined with 150,000 PSI tensile strength makes them ideal for heavy machinery, structural assemblies, and equipment requiring reliable fastening under extreme loads. The external hex drive facilitates high-torque installation while the flanged design distributes clamping force effectively, preventing surface damage and maintaining joint integrity. These fully threaded fasteners with coarse UNC threads provide superior vibration resistance in automotive, construction, and manufacturing applications where durability and consistent performance are critical.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for optimal assembly performance. Complies with IFI 111/SAE J429 standards for Grade 8 fasteners, ensuring consistent quality and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety. Features 5/16"-18 UNC coarse threads with right-hand orientation and includes comprehensive material certification for traceability in regulated industries.
