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Worldwide distributor of NSN parts and consumables located in the USA.

Recessed Washer

Model / MPN: 21820 FIND 40 | NSN: 5310-00-149-9146
ITAR Registered seal

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 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.

Product Details
NATO Stock Number
5310-00-149-9146
Sold in multiples of
1 HD
DEMIL
NO
Hole Diameter
Between 0.378 inches and 0.388 inches
Outside Diameter
0.687 inches
Recess Diameter
Between 0.483 inches and 0.495 inches
Material Thickness
0.078 inches
Min. Tensile Strength (psi)
125000 pounds per square inch
Recess Angle
90.0 degrees
Material
Steel comp 1330 or steel comp 4130
Material Specification
66 federal standard single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification single treatment response
Style Designator
15 recessed
Style Designator
Recessed

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21820 FIND 40 Cross Reference
  • MS20002-C6
  • 809086
  • 36398-00
  • 21140-34
  • 21170-50
  • 21331 FIND 30
  • 21317 FIND 43
  • 21835 FIND 50
  • 21816-001 FIND 39
  • 21110 FIND 43
  • 21194 FIND 29
  • 21316 FIND 5
  • 21333 FIND 44
  • 21340 FIND 35
  • 21803 FIND 31
  • 21808 FIND 29
  • 21817 FIND 33
  • 21822 FIND 3
  • 21838 FIND 44
  • 938.75.11.103
  • Z00.N5744532425
  • 410050020
  • MS20002C6
  • NAS143-6C
  • MS20002-C6
  • 000004001220000
  • MS20002C6
  • 10082396
  • 809086-00
  • 5310001499146
  • NASM20002-C6
  • 410050020
  • MS20002C6