Model: 4D0028C9

Recessed Washer

Properties:

Outside Diameter
Between 1.037 inches and 1.047 inches
Recess Diameter
Between 0.564 inches and 0.568 inches
Material Thickness
Between 0.085 inches and 0.101 inches
Hardness Rating
Between 38.0 rockwell c and 45.0 rockwell c
Recess Angle
90.0 degrees
Material
Steel comp 4130
Material Specification
Mil-s-6758 military specification single material response or mil-18729 military specification single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, ty2, cl2 federal specification single treatment response
Style Designator
15 recessed
NSN
5310-01-422-8570
Part Number
4D0028C9
Description
Washer,recessed
CAGE
10630

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 4D0028C9 NSN 5310-01-422-8570

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:
BA
CRITL:
X

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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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