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NSN: 5310-00-000-0079
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Part Numbers

Item Number Item Description
10910174-33 Washer, Flat
5310000000079 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.
CQFM A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
AAUB The length of a straight line which passes through the center of a hole, and terminates at the circumference.
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.
CXCY The name assigned to the item by the government agency or commercial organization controlling the design of the item.
ABMW The style designation indicating the configuration that most nearly corresponds to the peripheral shape of the item.
ABNM A measurement of the smallest dimension of an item, in distinction from length or width.

10910174-33 Flat Washer

Cage SCY13

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):
Cross-sectional Shape Style (AAGR):
Hardness Rating (CQFM):
33.0 rockwell c minimum and 38.0 rockwell c maximum
Hole Diameter (AAUB):
0.396 inches minimum and 0.416 inches maximum
Material (MATT):
Steel comp 4130 or steel comp 4140 or steel comp 8640 or steel comp 8740 overall
Overall Diameter (ADAV):
0.690 inches minimum and 0.710 inches maximum
Part Name Assigned By Controlling Agency (CXCY):
Washer, flat metal, round hardened
Peripheral Shape Style (ABMW):
Thickness (ABNM):
0.151 inches minimum and 0.165 inches maximum

National Stock Number (NSN)