S-99926A144 1/4"-20 x 1 3/4" Stainless Steel Hex Drive Flat Head Screws
Stainless 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 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
- Exceptional mechanical strength delivering 70,000 PSI tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
- Precise thread engagement with Class 3A fit and UNC coarse threads ensuring secure fastening and vibration resistance
- Optimized flush mounting featuring undercut flat head design with 100° countersink angle for seamless surface integration
- Enhanced installation efficiency through hex drive design providing superior torque transmission and slip resistance
- Controlled thread engagement with partial threading allowing precise clamping force distribution
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
These 1/4"-20 UNC flat head screws deliver critical engineering advantages where surface flushness and high strength are paramount. The 18-8 stainless steel composition with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for marine, food processing, and outdoor equipment applications. The undercut flat head profile with 100° countersink angle ensures perfect flush mounting while the hex drive design prevents cam-out during high-torque installation. With Class 3A thread fit and coarse thread spacing, these screws maintain secure fastening in vibrating environments while the partial threading allows precise control over clamping pressure distribution across joined materials.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread specifications. The screws feature a 1/4"-20 thread size with 1-3/4" length and 1/8" hex drive configuration. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial markets and restricted substance requirements.
