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:
A
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

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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

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