Model: A51B21644-15

Recessed Washer

Description:

0.514 inches hole diameter, 1.750 inches outside diameter, 0.187 inches overall height, 0.604 inches recess diameter, 0.187 inches material thickness.

Special Features:

One bearing surface chamfered 0.125 in. By 45 deg

Properties:

Hole Diameter

Between 0.514 inches and 0.523 inches

Outside Diameter

1.750 inches

Overall Height

0.187 inches

Recess Diameter

Between 0.604 inches and 0.620 inches

Recess Depth

0.094 inches

Material Thickness

0.187 inches

Hardness Rating

Between 46.0 rockwell c and 49.0 rockwell c

Recess Angle

90.0 degrees

Part Name Assigned By Controlling Agency

Navy special project

Heat Treatment

Quenched and tempered

Material

Steel

Material Specification

Mil-s-8949 military specification single material response

Surface Treatment

Cadmium

Style Designator

15 recessed

Style Designator

Recessed

Test Data Document

81349-mil-i-6868 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).

NSN

5310-00-004-7046

Part Number

A51B21644-15

Description

Washer,recessed

CAGE

61174

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 A51B21644-15 NSN 5310-00-004-7046

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:

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