S-98164A711 3/8"-16 x 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 from 316 stainless steel with passivated finish, ideal for harsh chemical and marine environments
- Precise thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant fastening in critical applications
- High mechanical strength with 70,000 PSI tensile strength for demanding industrial loads and stress conditions
- Easy installation and removal using standard 7/32" hex drive tools, reducing assembly time and labor costs
- Full threading along 4" length provides maximum grip and load distribution across the entire fastener
- Rounded button head design offers a low-profile, finished appearance while minimizing snagging hazards
- Regulatory compliance meets ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
Professional Applications & Engineering Value
This 316 stainless steel rounded head screw delivers exceptional performance in corrosive and high-stress environments where fastener failure is not an option. The combination of passivated finish and 316 stainless steel material provides superior resistance to chlorides, acids, and extreme temperatures, making it ideal for chemical processing equipment, marine hardware, and food processing machinery. The Class 3A thread fit and UNC coarse threading ensure rapid assembly with minimal cross-threading risk, while the hex drive configuration allows for high torque application without stripping. These fully threaded screws maintain consistent clamping force across the entire 4" length, preventing joint loosening in vibrating machinery and structural applications.
Specification Summary & Compliance
This fastener features 3/8"-16 UNC coarse threads with Class 3A thread fit precision manufactured to ASME B18.3 specifications where applicable per ASTM F879. The screw maintains dimensional accuracy with a 0.656" head diameter and 0.199" head height in a standard rounded button head profile. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for regulated industries and international markets.
