National Item Identification Number
00-778-0261
National Stock Number
Item Name
WASHER,FLAT
Federal Supply Class
5310
Description
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.
Commercial and Government Entity Code (Supplier Data)
55469
ESSEX PRECISION CONTROLS INC.
6 SUNNEN DR
SAINT LOUIS
MO
63143
314-644-3000
K2523
96046
CRANE PUMPS & SYSTEMS INC
420 3RD ST
PIQUA
OH
45356
937-615-3553
U0215
WINDER POWER LTD
BELGRAVE WORKS TOWN STREET
STANNINGLEY LEEDS
LS28 6ES
UNITED KINGDOM
0113 255 5666
NSN (National Stock Number) 5310-00-778-0261, 5310007780261 NIIN (National Identification Number) 00-778-0261, 007780261
Part Numbers (Reference Numbers)
220534
503-4-10364-000
50950
83-00003
83-00003
Required Categories
MATERIAL
HARDNESS RATING
HOLE DIAMETER
PERIPHERAL SHAPE STYLE
OVERALL DIAMET
Required Description
STEEL OVERALL
90.0 ROCKWELL K MINIMUM OR
167.0 ROCKWELL K MAXIMUM
0.318 INCHE