S-98164A535 3/8"-16 x 1 3/8" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 in harsh environments thanks to 316 stainless steel construction with passivated surface treatment
- Superior load-bearing capability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Precise, reliable fastening ensured by Class 3A thread fit and UNC coarse threading for vibration resistance
- Quick, secure installation with 7/32" hex drive that prevents cam-out and allows high torque application
- Full thread engagement along the entire 1-3/8" length provides maximum holding power and alignment
- Rounded button head design offers a finished appearance while minimizing protrusion in assembled components
- Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This 316 stainless steel rounded head screw delivers critical performance advantages in corrosive and high-stress environments. The combination of passivated finish and marine-grade 316 composition provides exceptional protection against chemical exposure, saltwater, and industrial atmospheres. The UNC coarse threading with Class 3A fit ensures rapid assembly with minimal cross-threading risk while maintaining vibration resistance in dynamic applications. The hex drive configuration allows for high torque installation without slippage, making these fully threaded screws ideal for machinery, marine equipment, chemical processing systems, and structural assemblies where reliability and corrosion resistance are paramount. The rounded head profile distributes clamping force evenly while presenting a clean, finished appearance.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread spacing (3/8"-16). Complies with ASME B18.3 specifications where identified as ASTM F879. Meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations (current as of 06/14/2023 with 235 SVHC). Features include 0.656" head diameter, 1-3/8" length, and full threading throughout.
