Model: 140-007-20-18C4

Recessed Washer

Properties:

Hole Diameter
Between 0.312 inches and 0.322 inches
Outside Diameter
Between 0.552 inches and 0.572 inches
Material Thickness
Between 0.120 inches and 0.130 inches
Min. Tensile Strength (psi)
240000 pounds per square inch
Top Recess Diameter
Between 0.382 inches and 0.392 inches
Bottom Recess Angle
Between 89.5 degrees and 90.5 degrees
Top Recess Angle
Between 89.5 degrees and 90.5 degrees
Bottom Recess Diameter
Between 0.382 inches and 0.392 inches
Surface Finish
63.0 microinches bottom
Surface Finish
63.0 microinches top
Material
Steel comp h11
Material Specification
Ams 6485 assn standard single material response or ams 6487 assn standard single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Mil-c-8837, type 2, cl 2 military specification single treatment response
Style Designator
Recessed both sides
NSN
5310-01-256-9736
Part Number
140-007-20-18C4
Description
Washer,recessed
CAGE
97499

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 140-007-20-18C4 NSN 5310-01-256-9736

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:
A
ESD:
ESD:
MMAC:
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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