Model: 53488W-428

Concave Washer

Properties:

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

NSN

5310-01-434-5879

Part Number

53488W-428

Description

Washer,concave

CAGE

56878

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.

Part 53488W-428 NSN 5310-01-434-5879

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

15930

FIIG:

A022B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

194160

UFC:

55210

LTL:

50.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Equipment for Aircraft

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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