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NSN: 5310-00-001-4712
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Part Numbers

Item Number Item Description
SM-B-640111 Washer, Flat

Master Requirement Codes

Code Translation
ABMX The style designation indicating the configuration that most nearly corresponds to the shape of the center hole.
AAGR The style designation indicating the configuration that most nearly corresponds to the cross-sectional shape of the item.
AAUB The length of a straight line which passes through the center of a hole, and terminates at the circumference.
MDCL The specification, standard, or manufacturers reference, and the classification designation, such as class, condition, temper, and the like, that identifies the material.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
ADAV A measurement of the longest straight line across a circular cross-sectional plane.
ABMW The style designation indicating the configuration that most nearly corresponds to the peripheral shape of the item.
STDC The specification, standard, or manufacturers reference, and the classification designation, such as type, class, grade, and the like, that identifies the surface treatment material.
SFTT The metallic, nonmetallic, and/or chemical properties with which the item is plated, dipped, and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.
ABNM A measurement of the smallest dimension of an item, in distinction from length or width.

SM-B-640111 Flat Washer

Cage 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.

Technical Characteristics

Center Hole Shape Style (ABMX):
Round
Cross-sectional Shape Style (AAGR):
Rectangular
Hole Diameter (AAUB):
0.266 inches nominal
Material Document And Classification (MDCL):
Qq-s-698,cond hrcq,finish ar fed spec all material responses overall
Material (MATT):
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
Overall Diameter (ADAV):
0.938 inches nominal
Peripheral Shape Style (ABMW):
Round
Surface Treatment Document And Classification (STDC):
Qq-p-416,ty 2,cl 2 fed spec single treatment response overall
Surface Treatment (SFTT):
Cadmium overall and chromate overall
Thickness (ABNM):
0.064 inches nominal

National Stock Number (NSN)

5310-00-001-4712