S-91253A448 7/16"-20 x 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat 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
- Superior corrosion resistance with Black-Oxide coating on alloy steel, extending service life in demanding industrial environments.
- Exceptional tensile strength of 130,000 psi ensures reliable performance under high-stress applications without failure.
- Precise Class 3A thread fit provides tight, secure fastening with minimal risk of loosening or cross-threading.
- Fully threaded design offers consistent grip along the entire length for uniform load distribution.
- 82° countersink angle allows for a flush, low-profile finish, reducing snagging and improving aesthetics.
- Hex drive (1/4") compatibility enables easy installation with standard tools, speeding up assembly processes.
- Compliance with ASTM F835, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
These 7/16"-20 UNF flat head screws are engineered for high-performance industrial assemblies where reliability and durability are critical. The Black-Oxide Alloy Steel construction, combined with a Rockwell C39 hardness, resists wear and corrosion in harsh conditions, such as machinery, automotive, and construction applications. The fine thread spacing and Class 3A thread fit ensure precise engagement, reducing vibration-induced loosening and enhancing joint integrity. Ideal for countersunk installations, the 82° angle provides a smooth, flush finish, minimizing protrusions in tight spaces. This design addresses common pain points like fastener failure and maintenance downtime, making it a cost-effective solution for B2B procurement in demanding sectors.
Specification Summary & Compliance
This product features a UNF thread type with Class 3A thread fit for high precision in inch system measurements. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory adherence in industrial use.
