Model: 7R4-18D

Recessed Washer

Properties:

Hole Diameter

Between 1.087 inches and 1.090 inches

Outside Diameter

Between 1.428 inches and 1.431 inches

Overall Height

Between 0.155 inches and 0.160 inches

Recess Depth

Between 0.104 inches and 0.109 inches

Material Thickness

Between 0.064 inches and 0.084 inches

Surface Finish

100.0 microinches all surfaces

Material

Aluminum alloy

Material Specification

Qq-a-225/4 federal specification single material response or qq-a-225/6 federal specification single material response or qq-a-225/5 federal specification single material response

Surface Treatment

Anodize

Style Designator

Recessed

NSN

5310-00-209-1686

Part Number

7R4-18D

Description

Washer,recessed

CAGE

43999

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 maximum 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.

Part 7R4-18D NSN 5310-00-209-1686

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

15933

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:

0.4000lbs

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:

194120

UFC:

95100

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7616108000
SITC: 69440
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Cotters, cotter-pins, washers and similar articles, of aluminum