Model: 20027-3

Valve Seat

Special Features:

Two lugs on top of flange, 0.375 in.W, 0.219 in. H

Properties:

Thread Class

3a single threaded portion

Thread Length

0.250 inches single threaded portion

Flange Diameter

Between 1.092 inches and 1.093 inches

Body Inside Diameter

Between 0.548 inches and 0.719 inches

Flange Seat To Disk End Height

Between 0.155 inches and 0.156 inches

Under Flange Height

0.250 inches

Seat Angle In Deg

60.000

Thread Size

0.906 inches single threaded portion

Seating Surface Shape

Angular

Material

Steel

Material Specification

66, aisi 304/sae 30304 federal standard single material response

Style Designator

Threaded flanged

Thread Series Designator

Unef single threaded portion

NSN

4820-00-036-2166

Part Number

20027-3

Description

Seat,valve

CAGE

38683

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 20027-3 NSN 4820-00-036-2166

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:

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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