Model: 20-03540 PIECE 4QA

Valve Seat

Properties:

Seating Surface Shape
Radial
Material
Plastic polyamide flange
Material Specification
Dupont zytel 101 mfr ref single material response flange
Reference Number Differentiating Characteristics
Quality assurance tested for the submarine safety program
NSN
4820-01-143-1574
Part Number
20-03540 PIECE 4QA
Description
Seat,valve
CAGE
03950

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 20-03540 PIECE 4QA NSN 4820-01-143-1574

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:
N

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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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