Model: A189-51

Spring Tension Washer

Properties:

Hole Diameter

Between 0.253 inches and 0.260 inches

Outside Diameter

Between 0.396 inches and 0.416 inches

Overall Height

Between 0.021 inches and 0.041 inches

Material Thickness

0.006 inches

Part Name Assigned By Controlling Agency

Navy special project

Heat Treatment

Quenched and tempered

Material

Steel comp 1095

Material Specification

Mil-s-7947 cond 1 or 2 military specification single material response

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 1, cl 2 federal specification single treatment response

Style Designator

Spring tension

NSN

5310-01-009-6729

Part Number

A189-51

Description

Washer,spring Tension

CAGE

86928

A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.

Part A189-51 NSN 5310-01-009-6729

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

15938

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: 7318210000
SITC: 69422
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel