Model: 663681

Valve Seat

Special Features:

Six 0.165 in. Min, 0.175 in. Max diameter holes through flange on 0.906 in. Bolt circle dia

Properties:

Flange Diameter

Between 1.140 inches and 1.160 inches

Body Outside Diameter

Between 0.535 inches and 0.545 inches

Body Inside Diameter

Between 0.315 inches and 0.328 inches

Flange Seat To Disk End Height

Between 0.040 inches and 0.050 inches

Under Flange Height

Between 0.575 inches and 0.585 inches

Hardness Rating

40.0 rockwell c body

Hardness Rating

47.0 rockwell c face

Seating Surface Shape

Flat

Material

Steel

Style Designator

Plain flanged

Fsc Application Data

Pump and control unit, fuel, gasturbine engine, non-aircraft

NSN

4820-00-838-1326

Part Number

663681

Description

Seat,valve

CAGE

99193

A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see insert, engine valve seat.

Part 663681 NSN 4820-00-838-1326

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

22113

FIIG:

A15500

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:

051080

UFC:

29300

LTL:

RATING VARIABLE

LCL:

WCC:

594

TCC:

SHC:

ACC:

Trailers/Vehicles

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Schedule B and Export

Schedule B: 8481909090
SITC: 74790
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Parts of taps, cocks, valves and similar appliances, nesoi