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

Concave Washer

Model / MPN: 53488W-428 | NSN: 5310-01-434-5879
ITAR Registered seal

A washer which is round with a centrally located hole. One bearing surface is smooth, flat, and unbroken, the other bearing surface is smooth, unbroken, and is recessed to form a curved or spherical contour. See also washer (1), convex. Excludes washer (1), recessed and bearing, washer, thrust.

Product Details
NATO Stock Number
5310-01-434-5879
Sold in multiples of
1 HD
DEMIL
NO
Hole Diameter
Between 0.348 inches and 0.354 inches
Radius
0.300 inches
Outside Diameter
Between 0.505 inches and 0.515 inches
Recess Depth
0.051 inches
Material Thickness
Between 0.113 inches and 0.123 inches
Hardness Rating
Between 38.0 rockwell c and 44.0 rockwell c
Surface Finish
63.0 microinches counterbore wall
Material
Steel comp 8740 or steel comp 8630 or steel comp 4130
Material Specification
Mil-s-6049 military specification 1st material response or mil-s-6050 military specification 2nd material response or mil-s-6758 military specification 3rd material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification single treatment response
Style Designator
Concave
Specification Data
81205-bacw10au manufacturers standard
53488W Series Parts
Solicitations
Solicitation Description Qty UOM Close Date
SPE5E318T184D Washer, Concave 57 HD 07/23/2018

Pricing and Availability

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53488W-428 Cross Reference
  • BACW10AU4
  • BACW10AU4
  • BACW10AU4
  • BACW10AU4
  • K19701P4