Home » FSC Catalog » Nuts And Washers » 4027748

Pricing and Availability

Request a Quote

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.


Cross Reference

These part numbers have the same form, fit, and function as 4027748
Item Number Cage
4027748 6N299
570163-60 89305


Other parts in this series

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 89305


Hole Diameter: 25/64", Thickness: 1/16", Overall Diameter: 9/16", steel overall

AAGR Cross Sectional Shape
AAUB Hole Diameter
From 0.380" and 0.385"
ABMW Edge Shape
ABMX Center Hole Shape
1 round
ABMX Center Hole Shape
ABNM Thickness
From 0.055" and 0.065"
ADAV Overall Diameter
From 0.557" and 0.567"
MATT Material
National Stock Number (NSN): 5310-00-001-2035

Last Modified: 02/14/2017