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Cross Reference

These part numbers have the same form, fit, and function as sm-b-640111
Item Number Cage
SM-B-640111 80063

Technical Definition

Washer, Flat, also referenced with federal logistics item name code 13393 - 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 maximum 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.


Description: Flat Washer
Mfr. Cage 80063


Hole Diameter: 17/64", Thickness: 1/16", Overall Diameter: 15/16", steel comp 1008 overall or steel comp 1009 overall or steel comp 1010 overall or steel comp 1015 overall or steel comp 1018 overall or steel comp 1020 overall

AAGR Cross Sectional Shape
AAUB Hole Diameter
0.266 inches
ABMW Edge Shape
ABMX Center Hole Shape
1 round
ABMX Center Hole Shape
ABNM Thickness
0.064 inches
ADAV Overall Diameter
0.938 inches
MATT Material
Steel comp 1008 or steel comp 1009 or steel comp 1010 or steel comp 1015 or steel comp 1018 or steel comp 1020
MDCL Material Spec
Qq-s-698,cond hrcq,finish ar fed spec all material responses
SFTT Surface Treatment
Cadmium and chromate
STDC Surface Treatment Spec
Qq-p-416,ty 2,cl 2 fed spec single treatment response
National Stock Number (NSN): 5310-00-001-4712

Last Modified: 02/14/2017