Model: 56590

Recessed Washer

Special Features:

Both bearing surfaces chamfered on od 0.010 in. To 0.015 in. By 45 deg

Properties:

Hole Diameter
0.266 inches
Outside Diameter
Between 0.4375 inches and 0.4377 inches
Overall Height
Between 0.0445 inches and 0.0455 inches
Recess Diameter
0.326 inches
Recess Depth
0.030 inches
Material Thickness
0.455 inches
Hardness Rating
Between 58.0 rockwell c and 62.0 rockwell c
Recess Angle
90.0 degrees
Surface Finish
32.0 microinches bottom
Surface Finish
32.0 microinches top
Material
Steel
Material Specification
Mil-s-7420 military specification single material response
Style Designator
15 recessed
Style Designator
Recessed
NSN
5310-00-125-5364
Part Number
56590
Description
Washer,recessed
CAGE
93835

A washer of any peripheral shape having a centrally located hole. Both bearing surfaces are parallel and flat, but one or both of the bearing surfaces must be broken by a counterbore, countersink, or similarly shaped recess. The thickness must not exceed 25 per cent of the outside diameter or the largest outside dimension. The maximum limit of the tolerance or range applied to the thickness and/or largest outside dimension must be used to determine compliance. Excludes washer, concave, retainer, packing, and thrust type washers. See also spacer, sleeve; and spacer, stepped.

Part 56590 NSN 5310-00-125-5364

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15933
FIIG:
A022B0
Concept No.:
1
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318220000
  • SITC: 69422
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Washers other than lock washers, iron or steel

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