S-90429A115 1-72 x 5/16" 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, extending service life in harsh industrial environments
- Precise Class 3A thread fit ensures secure fastening with minimal vibration loosening in critical assemblies
- Exceptional 130,000 psi tensile strength provides reliable performance under high-stress conditions
- Optimized 82° countersink angle allows for flush mounting in precision applications
- Fine thread spacing delivers enhanced grip and superior load distribution
- Full threading design enables maximum engagement depth and holding power
- Rockwell C39 hardness maintains structural integrity through repeated installation cycles
Professional Applications & Engineering Value
These 1-72 UNF flat head screws with hex drive configuration solve critical challenges in precision assembly applications where space constraints and vibration resistance are paramount. The black-oxide alloy steel construction combined with Class 3A thread fit provides exceptional dimensional stability and corrosion protection, making them ideal for aerospace components, medical devices, and electronic enclosures requiring reliable, vibration-resistant fastening. The fine thread spacing and fully threaded design ensure maximum surface contact and superior clamping force distribution, while the standardized 82° countersink angle facilitates perfect flush mounting in precision-machined surfaces. These industrial fasteners deliver consistent performance in applications demanding exacting tolerances and long-term reliability.
Specification Summary & Compliance
Manufactured to exacting inch system dimensions with Class 3A thread fit per UNF standards, these screws maintain precise dimensional accuracy throughout production. Compliance with ASME B18.3 and ASTM F835 manufacturing specifications ensures consistent quality and performance. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, making these screws suitable for global industrial applications with strict regulatory requirements.
