S-91834A101 2-56 Fed. Spec. FF-N-836, NAS671C2 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
- Precise thread engagement with Class 3B thread fit ensuring reliable, vibration-resistant connections in critical assemblies
- Space-saving narrow profile design ideal for confined spaces while maintaining full wrenching capability
- Enhanced durability through compliance with stringent Fed. Spec. FF-N-836 and NAS671C2 aerospace/defense standards
- Optimized installation efficiency with coarse UNC threads providing faster assembly and reduced cross-threading risks
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for global manufacturing applications
- Secure right-hand threading compatible with standard industrial equipment and maintenance procedures
Professional Applications & Engineering Value
This precision 2-56 UNC hex nut delivers exceptional engineering value through its 18-8 stainless steel composition and Class 3B thread fit, specifically designed to address vibration loosening and corrosion challenges in demanding applications. The narrow profile enables installation in tight spaces common in aerospace assemblies, electronic enclosures, and precision instrumentation where conventional nuts cannot fit. Meeting Fed. Spec. FF-N-836 and NAS671C2 standards ensures consistent performance in critical systems, while the coarse thread design accelerates assembly operations without compromising connection integrity. Ideal for OEM manufacturing and MRO applications requiring reliable stainless steel fasteners with documented compliance.
Specification Summary & Compliance
Manufactured to exacting Class 3B thread fit tolerances with UNC coarse threads (2-56 size) and right-hand thread direction. Dimensions include 5/32" width and 1/16" height with external hex drive style. Compliant with Fed. Spec. FF-N-836 and NAS671C2 specifications. Fully meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions.
