Model: 21D5C8C

Recessed Washer

Properties:

Hole Diameter
Between 0.504 inches and 0.515 inches
Outside Diameter
0.875 inches
Recess Diameter
Between 0.604 inches and 0.620 inches
Material Thickness
0.062 inches
Min. Tensile Strength (psi)
140000 pounds per square inch
Recess Angle
90.0 degrees
Material
Iron alloy 660
Material Specification
Ams 5525 assn standard single material response
Surface Treatment
Passivate
Style Designator
Recessed
NSN
5310-01-237-9392
Part Number
21D5C8C
Description
Washer,recessed
CAGE
04236

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 21D5C8C NSN 5310-01-237-9392

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

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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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