Model: NTA11551-4C

Recessed Washer

Properties:

Hole Diameter

Between 0.250 inches and 0.261 inches

Outside Diameter

Between 0.475 inches and 0.495 inches

Recess Diameter

Between 0.332 inches and 0.352 inches

Material Thickness

Between 0.057 inches and 0.069 inches

Hardness Rating

Between 36.0 rockwell c and 40.0 rockwell c

Recess Angle

Between 90.0 degrees and 100.0 degrees

Material

Steel comp 4130 or steel comp 8630 or steel comp 4135

Material Specification

Mil-s-18729 military specification 1st material response or mil-s-18728 military specification 2nd material response or mil-s-18733 military specification 3rd material response

Surface Treatment

Nickel and cadmium

Surface Treatment Specification

Ams 2416 assn standard single treatment response

Style Designator

15 recessed

Specification Data

81205-bacw10bp manufacturers standard

NSN

5310-01-042-8874

Part Number

NTA11551-4C

Description

Washer,recessed

CAGE

A0170

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 NTA11551-4C NSN 5310-01-042-8874

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:

0.1000lbs

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