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Valve Seat NSN 4820-01-256-9873

Item Description

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.

NSN 4820-01-256-9873 NSN: 4820-01-256-9873

Features and Characteristics

Thread Class
3a single threaded portion
Thread Length
0.172 inches single threaded portion
Flange Diameter
Between 1.104 inches and 1.114 inches
Body Inside Diameter
Between 1.105 inches and 1.113 inches
Flange Seat To Disk End Height
0.229 mils and 0.239 centimeters
Under Flange Height
Between 0.105 inches and 0.115 inches
Seat Angle In Deg
45.000
Seal Accommodation Type
Grooved
Thready Qty Per Inch (tpi)
20 single threaded portion
Thread Size
1.188 inches single threaded portion
Seating Surface Shape
Angular
Criticality Code Justification
Zzzy
Special Features
Inspection per mil-i-45208; shipment and storage per mil-std-129; clean per mil-std-767
Material
Nickel alloy
Material Specification
Qq-n-288 federal specification single material response
Style Designator
Threaded flanged
Thread Series Designator
Un single threaded portion
Reference Number Differentiating Characteristics
Material will be in accordance with ships parts control center activity hx quality control, manufacturing and testing specifications
FSC
4820 Nonpowered Valves
NIIN
012569873
NSN
4820012569873

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
803-4384536-4XXX-13(SPCLN)
Cage Code:
80064
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 8481909090
  • NAICS: 332911
  • SITC: 74790
  • Description: Parts of taps, cocks, valves and similar appliances, nesoi
  • End Use (Code 21180):
    Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-01-256-9873
What are the manufacturers of nsn 4820012569873?
Does this nsn 4820012569873 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820012569873
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.
Does nsn 4820012569873 contain any precious metals?
No precious metal content.
Does nsn 4820012569873 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820012569873?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
22113
FIIG:
A15500
App. Key:
A
Cond. Code:
2
Status:
A

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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
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