18-8 Stainless Steel NAS Flat Washers
What are 18-8 stainless NAS flat washers? 18-8 stainless steel NAS flat washers are precision washers made to National Aerospace Standards from corrosion-resistant 18-8 stainless. Held to tight aerospace flatness and finish tolerances, they provide certified, repeatable load distribution for aircraft, missile, and defense assemblies where a NAS part number is specified.
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Why 18-8 stainless for NAS washers?
18-8 stainless gives NAS washers strong corrosion and oxidation resistance, which is why 300-series stainless is a common material for aircraft and aerospace hardware exposed to weather, altitude, and moisture. Beyond the material, the NAS standard guarantees the tight tolerances that mission-critical assemblies require, so the washer performs and interchanges reliably. These washers are called out by part number on drawings, so where a NAS number is specified, use the certified stainless NAS washer rather than a commercial substitute. Full material certifications support traceability and spec conformance.
Why choose 18-8 stainless NAS flat washers
- Aerospace standard: manufactured to National Aerospace Standards.
- Corrosion resistant: 18-8 stainless resists oxidation and rust.
- Tight tolerances: closer flatness and finish than commercial washers.
- Traceable: certified and called out by part number.
Common applications for 18-8 NAS flat washers
- Aircraft and airframe assemblies
- Missiles and aerospace hardware
- Defense and government programs
- Corrosion-exposed aerospace connections
For other military and aerospace standards, see MS military standard flat washers, and browse every option on the main flat washers category.
18-8 Stainless NAS Flat Washers FAQ
What does NAS stand for?
National Aerospace Standard, a family of technical standards maintained by the Aerospace Industries Association for aerospace components including washers.
Why 18-8 stainless for aerospace washers?
18-8 stainless resists oxidation and corrosion, which suits aircraft and aerospace hardware exposed to weather, altitude, and moisture.
Can I substitute a commercial washer?
NAS washers are held to tighter tolerances and called out by part number. Substituting a commercial washer usually requires formal engineering disposition.