S-94063A316 8-32 x 5/16" ASME B18.6.3 Tamper-Resistant Drilled Spanner Flat Head Screws
Tamper-Resistant Drilled Spanner 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, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
- Secure tamper-resistant installation through drilled spanner drive design, preventing unauthorized removal
- Precise flush mounting with 82° countersink angle and standard flat head profile for seamless surface integration
- Optimized thread engagement through UNC coarse threading and Class 2A fit, ensuring vibration resistance and easy assembly
- Full-length thread coverage providing maximum grip strength across the entire 5/16" length
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 8-32 UNC flat head spanner screws deliver critical performance where security and corrosion resistance are paramount. The 18-8 stainless steel composition combined with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, food processing machinery, and outdoor installations. The drilled spanner drive offers tamper-resistant benefits for security-sensitive assemblies while maintaining clean aesthetics. With fully threaded design and coarse UNC threading, these screws ensure maximum holding power in metal, plastic, and composite materials, preventing loosening under vibration - a common challenge in automotive, aerospace, and industrial machinery applications.
Specification Summary & Compliance
This flat head spanner screw features precision Class 2A thread fit with UNC coarse threading (8-32 size) and maintains dimensional accuracy per ASME B18.6.3 specifications. The manufacturing process ensures consistent head diameter tolerance (-0.04" to 0") and proper 82° countersink angle for flush mounting. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted substances for global industrial applications.
