Model: 428178-1

Extension Helical Spring

Special Features:

Stress relieve as required; extension w/o permanent set = 0.38; gap width between loop end and body 0.08 in; remove burrs and break sharp edges

Properties:

Inside Diameter

0.332 inches

End Style

Short twisted hook both ends

Stock Diameter

Between 0.057 inches and 0.059 inches

Spring Free Length

Between 1.634 inches and 1.678 inches

Coil Quantity

18.7

Design Type

Mainspring

Coil Helix Direction

Left-hand or right-hand

Spring Deflection Rate

32.000 pounds per inch

Spring Free Outside Diameter

0.390 inches

Material

Steel comp 316 or steel comp 302 or steel comp 304

Surface Treatment

Passivate

Style Designator

Cylindrical

NSN

5360-01-510-7680

Part Number

428178-1

Description

Spring,helical,extension

CAGE

80020

Part 428178-1 NSN 5360-01-510-7680

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

04227

FIIG:

A02900

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:

177940

UFC:

87400

LTL:

RATING VARIABLE

LCL:

WCC:

579

TCC:

SHC:

ACC:

Construction Materials

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