S-91858A585 5/16"-18 x 1 1/4" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted 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 316 stainless steel construction, ideal for harsh chemical and marine environments
- High mechanical strength with 70,000 psi tensile strength and Rockwell B80 hardness for reliable performance under load
- Precision thread engagement with Class 2A thread fit and UNC coarse threads for quick assembly and vibration resistance
- Enhanced surface protection through passivated finish that improves corrosion resistance and extends service life
- Flush mounting capability with standard 82° countersink angle and flat head design for smooth surface finishes
- Full thread coverage along the entire 1-1/4" length provides maximum grip and holding power
- Wide compatibility with slotted drive style for universal tool access and right-hand threading for standard applications
Professional Applications & Engineering Value
These 316 stainless steel flat head screws deliver exceptional value in demanding industrial applications where corrosion resistance and mechanical integrity are paramount. The combination of fully threaded UNC coarse spacing and Class 2A thread fit ensures reliable fastening in vibration-prone environments while facilitating quick installation. The passivated finish significantly enhances the natural corrosion resistance of 316 stainless steel, making these flat head machine screws ideal for chemical processing equipment, marine hardware, and food processing machinery. The standardized 82° countersink angle provides flush mounting in precision applications, while the slotted drive style offers compatibility with common hand tools for maintenance and assembly operations.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. These inch system screws feature 5/16"-18 UNC coarse threads with right-hand direction and standard flat head profile. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for global industrial applications.
