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Worldwide distributor of NSN parts and consumables located in the USA.

Flat Washer

Model / MPN: SP890-5 | NSN: 5310-01-210-3882
ITAR Registered seal

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes disk, valve, graphite impregnated and lubricated items.

Product Details
NATO Stock Number
5310-01-210-3882
Sold in multiples of
25 EA
DEMIL
NO
Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.271 inches and 0.289 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
Between 0.055 inches and 0.065 inches
Overall Diameter
Between 0.438 inches and 0.440 inches
Material
Rubber synthetic
Material Specification
Accr 190, fscm 93366 mfr ref single material response

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SP890-5 Cross Reference
  • SP890-5
  • SP890-5
  • SP890-5