Model: 439B750PC3

Valve Seat

Properties:

Flange Diameter

Between 4.750 inches and 4.751 inches

Body Outside Diameter

3.938 inches

Body Inside Diameter

Between 3.013 inches and 3.015 inches

Seat Radius

1.500 inches

Flange Seat To Disk End Height

Between 0.938 inches and 0.940 inches

Under Flange Height

2.000 inches

Seating Surface Shape

Radial

Material

Steel

Material Specification

Qq-s.637 federal specification single material response

Style Designator

Plain flanged

NSN

4820-00-794-2777

Part Number

439B750PC3

Description

Seat,valve

CAGE

01289

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 439B750PC3 NSN 4820-00-794-2777

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

051080

UFC:

29300

LTL:

RATING VARIABLE

LCL:

WCC:

593

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