18-8 Stainless Steel NAS Flat Washers

NAS Flat Washers

18-8 Stainless Steel National Aerospace Standards Flat Washers


NAS Flat Washers in this selection feature a smaller Outside Diameter (OD) and Inside Diameter (ID) as per the National Aerospace Standards. NAS Flat washers are used on military applications and ID and OD are tighter in size than a Standard Flat Washer.

NAS Flat washers are used on military applications. 18-8 Stainless steel washers are corrosion resistant in fresh or rain water. NAS flat washers are standardized for use with aircrafts and military applications requiring National Aerospace Standards.


NAS Washer Specifications

Washer Size Inner Diameter (ID) Outer Diameter (OD) Thickness
#0 Max 0.063" - Min 0.060" Max 0.099" - Min 0.090" Max 0.016" - Min 0.013"
#2 Max 0.089" - Min 0.085" Max 0.149" - Min 0.140" Max 0.016" - Min 0.013"
#3 Max 0.102" - Min 0.093" Max 0.180" - Min 0.150" Max 0.032" - Min 0.026"
#4 Max 0.115" - Min 0.105" Max 0.208" - Min 0.200" Max 0.032" - Min 0.026"
#5 Max 0.128" - Min 0.118" Max 0.238" - Min 0.228" Max 0.032" - Min 0.026"
#6 Max 0.143" - Min 0.133" Max 0.267" - Min 0.257" Max 0.032" - Min 0.026"
#6L Max 0.143" - Min 0.133" Max 0.267" - Min 0.257" Max 0.016" - Min 0.013" (Light)
#8 Max 0.169" - Min 0.160" Max 0.304" - Min 0.296" Max 0.032" - Min 0.026"
#8L Max 0.169" - Min 0.160" Max 0.304" - Min 0.296" Max 0.016" - Min 0.013" (Light)
#10 Max 0.195" - Min 0.189" Max 0.354" - Min 0.325" Max 0.063" - Min 0.058"
#10L Max 0.195" - Min 0.189" Max 0.354" - Min 0.325" Max 0.032" - Min 0.028" (Light)
#416 Max 0.255" - Min 0.245" Max 0.468" - Min 0.458" Max 0.063" - Min 0.058"
#416L Max 0.255" - Min 0.245" Max 0.468" - Min 0.458" Max 0.032" - Min 0.028" (Light)
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