S-98164A139 8-32 x 3/4" 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
- Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Precise thread engagement with Class 3A thread fit ensuring reliable fastening and vibration resistance
- High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Easy installation with 3/32" hex drive providing secure tool engagement and reduced stripping risk
- Full thread coverage along the 3/4" length for maximum grip and load distribution
- Standard compliance with ASME B18.3 specifications ensuring dimensional accuracy and interchangeability
- Environmental safety with RoHS 3 and REACH compliance for regulated industrial applications
Professional Applications & Engineering Value
These 316 stainless steel rounded head screws deliver exceptional performance in corrosive environments where standard fasteners fail. The passivated finish enhances surface protection while maintaining electrical conductivity, making them ideal for chemical processing, marine equipment, and food-grade applications. With Class 3A thread fit and UNC coarse threading, they provide rapid assembly and superior vibration resistance in machinery, electrical enclosures, and structural components. The fully threaded design ensures maximum engagement in varied material thicknesses, while the button head profile offers a low-profile finish that reduces snagging hazards in automated systems.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision dimensional control. Features 8-32 UNC coarse threads with right-hand direction and standard rounded head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include 70,000 psi tensile strength and Rockwell B55 hardness for consistent performance in industrial fastening applications.
