Model: A51B21644-23

Recessed Washer

Special Features:

Top surface chamfered 0.025 in.

Properties:

Hole Diameter
Between 0.514 inches and 0.523 inches
Outside Diameter
1.550 inches
Recess Diameter
Between 0.604 inches and 0.620 inches
Material Thickness
0.187 inches
Recess Angle
90.0 degrees
Surface Finish
125.0 microinches all surfaces
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel
Material Specification
G-1013, comp d6ac mfr ref single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Mil-c-8837, type 2, class 1 military specification single treatment response
Style Designator
15 recessed
NSN
5310-01-076-9429
Part Number
A51B21644-23
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 A51B21644-23 NSN 5310-01-076-9429

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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