2640-389X3PC40Q3

View detailed technical data, stock status, and sourcing information for: 2640-389X3PC40Q3
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-935-1578

Item Name Code

22113

Assigment Date

05/18/1967 (59 years ago)

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.

zzzy criticality code justification, items that support a level i or subsafe critical system/component that has undergone quality assurance during the acquisition process and requires objective quality evidence (oqe) traceable to permanent marking on the material reference number differentiating characteristics

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Criticality Code Justification: zzzy
Reference Number Differentiating Characteristics: items that support a level i or subsafe critical system/component that has undergone quality assurance during the acquisition process and requires objective quality evidence (oqe) traceable to permanent marking on the material

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-071-8347	No Name Available	03/11/1968

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
2640-340X1 PIECE 7	Valve Seat
2640-340X1 PIECE 7Q3	Valve Seat
2640-389X3PC40	Valve Seat
2640-389X3PC40Q3	Valve Seat
2640-801X1, PIECE 23	Valve Seat
2640-801X1, PIECE 23Q3	Valve Seat
803-4374431-A-04	Valve Seat
803-4384431 PIECE 4	Valve Seat
803-4384431 PIECE 4Q3	Valve Seat
803-4384431-A-04	Valve Seat
803-4384431-A-04Q3	Valve Seat
845-2050576 PIECE 7	Valve Seat
845-2050576 PIECE 7Q3	Valve Seat

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4820-00-935-1578?

The FSCG of the NSN 4820-00-935-1578 is 4820

Does the NSN 4820-00-935-1578 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-935-1578 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4820-00-935-1578 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-935-1578 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4820-00-935-1578 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Thu, May 18, 1967