Model: K39787-5

Concave Washer

Properties:

Hole Diameter

Between 0.417 inches and 0.427 inches

Radius

Between 0.365 inches and 0.385 inches

Outside Diameter

Between 0.608 inches and 0.618 inches

Material Thickness

Between 0.106 inches and 0.126 inches

Hardness Rating

Between 40.0 rockwell c and 46.0 rockwell c

Material

Steel comp 4130 or steel comp 8740

Material Specification

Mil-s-6758 military specification 1st material response or mil-s-18729 military specification 1st material response or mil-s-6049 military specification 2nd material response or ams 6358 assn standard 2nd 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

NSN

5310-01-160-4555

Part Number

K39787-5

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 K39787-5 NSN 5310-01-160-4555

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:

Construction Materials

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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