Model: 561056

Recessed Washer

Properties:

Hole Diameter
Between 0.310 inches and 0.330 inches
Outside Diameter
Between 0.640 inches and 0.660 inches
Overall Height
Between 0.050 inches and 0.080 inches
Recess Depth
Between 0.030 inches and 0.050 inches
Material Thickness
Between 0.033 inches and 0.048 inches
Hardness Rating
Between 30.0 rockwell c and 38.0 rockwell c
Material
Steel comp 410
Material Specification
Qq-s-763 federal specification single material response
Style Designator
Recessed
NSN
5310-00-987-9257
Part Number
561056
Description
Washer,recessed
CAGE
73030

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 561056 NSN 5310-00-987-9257

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
095190
UFC:
49790
LTL:
70.0
LCL:
70.0
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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