Model: 491998

Helical Compression Spring Seat

Properties:

Counterbore Diameter

Between 0.4800 inches and 0.5000 inches

Overall Height

0.5400 inches

First Step Diameter

0.9490 inches

First Step Length

0.0900 inches

Second Step Diameter

Between 1.2860 inches and 1.2880 inches

Bore Diameter

Between 0.3100 inches and 0.3140 inches

Material Hardness Rating

Between 35.0 rockwell c and 42.0 rockwell c

Design Type

Solid

End Diameter

Between 0.3100 inches and 0.3140 inches

Distance From End To First Step

Between 0.3550 inches and 0.3650 inches

Counterbore Length

Between 0.2600 inches and 0.2800 inches

Second Counterbore Length

Between 0.1050 inches and 0.1150 inches

Second Counterbore Diameter

Between 0.7700 inches and 0.7900 inches

Material

Steel, ams 5643

Material

Steel comp 630

Material Specification

Ams 5643 assn standard single material response

Surface Treatment

Anodize

Style Designator

Seat

Surface Treatment

Anodized

Fsc Application Data

Housing assembly, engine acft, p/n 491980

NSN

5340-00-914-5400

Part Number

491998

Description

Seat,helical Compression Spring

CAGE

77445

Part 491998 NSN 5340-00-914-5400

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

24328

FIIG:

T319-E

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

095190

UFC:

49790

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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