S-91253A093 3-48 x 3/16" 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
- Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- Superior tensile strength (130,000 psi) ensures reliable performance under high-stress applications
- Precision Class 3A thread fit guarantees secure, vibration-resistant fastening in critical assemblies
- Fully threaded design with 82° countersink angle provides maximum grip and flush mounting in thin materials
- Hex drive (1/16") and undercut flat head enables easy installation and prevents surface protrusion
- High hardness (Rockwell C39) maintains thread integrity and resists wear during repeated use
- Compliance with ASTM F835, RoHS 3, and REACH ensures material safety and regulatory acceptance
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 3-48 UNC flat head screws in black-oxide alloy steel address critical challenges in machinery assembly, electronics enclosures, and precision equipment. The coarse thread spacing and Class 3A fit prevent loosening under vibration, while the fully threaded design ensures consistent clamping force across varied material thicknesses. The 82° countersink angle and undercut head profile allow seamless flush mounting, reducing aerodynamic drag in automotive or aerospace components and minimizing snag risks in conveyor systems. With 130,000 psi tensile strength, they reliably replace inferior fasteners in high-load scenarios, from robotic arms to industrial controls, ensuring long-term operational safety.
Specification Summary & Compliance
This screw adheres to UNC thread standards with precise Class 3A thread fit for tight tolerances. Manufacturing follows ASTM F835 specifications, ensuring consistent quality in dimensions (3/16" length, 0.187" head diameter) and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for global industrial use.
