Model: K19701-4

Concave Washer

Properties:

Hole Diameter

Between 0.358 inches and 0.364 inches

Radius

Between 0.300 inches and 0.305 inches

Outside Diameter

Between 0.505 inches and 0.515 inches

Material Thickness

Between 0.113 inches and 0.123 inches

Hardness Rating

Between 38.0 rockwell c and 44.0 rockwell c

Material

Steel comp 8740 or steel comp 4037

Material Specification

Mil-s-6049 military specification 1st material response and mil-s-8695 military specification 2nd material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416 ty2 cl2 federal specification 1st treatment response

Style Designator

Concave

NSN

5310-01-291-4017

Part Number

K19701-4

Description

Washer,concave

CAGE

15653

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 K19701-4 NSN 5310-01-291-4017

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:

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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