S-94066A858 1/4"-28 x 3/4" Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws
Tamper-Resistant Drilled Spanner Stainless Steel Pan 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 80,000 psi tensile strength and Rockwell B96 hardness for reliable, long-term performance
- Precise fine threading (UNF 1/4"-28) ensures secure fastening and vibration resistance in critical assemblies
- Tamper-resistant drilled spanner drive (No. 14) provides enhanced security while maintaining clean aesthetic appearance
- Class 2A thread fit guarantees consistent installation and interchangeability with standard UNF components
- Fully threaded design maximizes engagement surface for superior holding power across the entire fastener length
- Regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global market acceptance
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head spanner screw delivers critical performance advantages in demanding applications where corrosion resistance, security, and precision threading are paramount. The combination of passivated finish and stainless steel material provides exceptional protection against rust and chemical degradation in marine, food processing, and outdoor equipment applications. The drilled spanner drive offers tamper-resistant benefits while maintaining a low-profile pan head design that won't interfere with surrounding components. With UNF fine threading and Class 2A thread fit, this fastener ensures precise engagement and vibration resistance in machinery, electronic enclosures, and precision instruments where reliability cannot be compromised.
Specification Summary & Compliance
This precision-engineered 1/4"-28 UNF spanner screw features Class 2A thread fit tolerances ensuring consistent installation performance and interchangeability. The fastener meets stringent manufacturing specifications including 80,000 psi tensile strength and Rockwell B96 hardness ratings. Regulatory compliance is confirmed with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, making it suitable for global industrial markets and environmentally conscious manufacturing operations.
