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.:
1
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

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:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
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

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