Valve Seat NSN 4820-01-257-1743

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: 4820-01-257-1743

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Features and Characteristics

Thread Class

3a single threaded portion

Thread Length

0.172 inches single threaded portion

Flange Diameter

Between 1.401 inches and 1.411 inches

Body Inside Diameter

Between 1.000 inches and 1.004 inches

Flange Seat To Disk End Height

0.261 mils and 0.271 centimeters

Under Flange Height

Between 0.104 inches and 0.114 inches

Seat Angle In Deg

45.000

Seal Accommodation Type

Grooved

Thready Qty Per Inch (tpi)

20 single threaded portion

Thread Size

1.500 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

012571743

NSN

4820012571743

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

803-4384536-5XXX-13(SPCLN)

Cage Code:

80064

Status:

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 4820-01-257-1743

What are the manufacturers of nsn 4820012571743?

Naval Ship Systems Command (80064)

Does this nsn 4820012571743 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820012571743
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 4820012571743 contain any precious metals?
No precious metal content.

Does nsn 4820012571743 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820012571743?
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:

Cond. Code:

Status:

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On Time Delivery
Certificate of Conformance
Quality Inspected Parts
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