255584 PIECE 21

View detailed technical data, stock status, and sourcing information for: 255584 PIECE 21
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-935-1581

Item Name Code

22113

Assigment Date

05/16/1967 (59 years ago)

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Below is a list of NSNs that have been officially superseded by this NSN: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
4820-00-045-5793	No Name Available	03/08/1968
4820-00-050-6495	No Name Available	09/15/1967
4820-00-936-8836	No Name Available	09/15/1967
4820-01-026-3848	No Name Available	04/01/1988
4820-01-043-3625	No Name Available	07/01/1980
4820-01-049-7961	No Name Available	06/01/1979

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
1425D7QA	Valve Seat
1425D7QAQ3	Valve Seat
2119007 PIECE 9DLRN	Valve Seat
2119007 PIECE 9DLRNQ3	Valve Seat
255584 PIECE 21	Valve Seat
255584 PIECE 21Q3	Valve Seat
255771 PIECE 24	Valve Seat
255771 PIECE 24Q3	Valve Seat
256313 PIECE 24	Valve Seat
256313 PIECE 24Q3	Valve Seat
2640-246 PIECE 10	Valve Seat
2640-246 PIECE 10Q3	Valve Seat
2640-337-1 PIECE 7 DLRN	Valve Seat
2640-337-1 PIECE 7DLRNQ3	Valve Seat
2640-337X1 PIECE 7	Valve Seat
2640-337X1 PIECE 7Q3	Valve Seat
2640-337X1PC27	Valve Seat
2640-337X1PC27Q3	Valve Seat
2640-357X3PC58	Valve Seat
2640-357X3PC58Q3	Valve Seat
2640-370X1 PIECE 38	Valve Seat
2640-370X1 PIECE 38Q3	Valve Seat
2640-370X2 PIECE 37	Valve Seat
2640-370X2 PIECE 37Q3	Valve Seat
2640-679X1PIECE7DLRN	Valve Seat
2640-679X1PIECE7DLRNQ3	Valve Seat
2640-687X1PC38	Valve Seat
2640-687X1PC38Q3	Valve Seat
2640-801X1 PIECE 21Q3	Valve Seat
2640-801X1PIECE21	Valve Seat
2640-820X58 PIECE 29	Valve Seat
2640-820X58 PIECE 29Q3	Valve Seat
2640-820X8 PIECE 21	Valve Seat
2640-820X8 PIECE 21Q3	Valve Seat
2640-820X8 PIECE 27	Valve Seat
2640-820X8 PIECE 27Q3	Valve Seat
2640-822X8 PIECE 38	Valve Seat
2640-822X8 PIECE 38Q3	Valve Seat
2640-901-7PIECE15	Valve Seat
2640-901X7 PIECE 15Q3	Valve Seat
2641-357-01 ITEM 10	Valve Seat
2641-357-01 ITEM 10Q3	Valve Seat
2641-357-03 ITEM 10	Valve Seat
2641-357-03 ITEM 10Q3	Valve Seat
2641-357-03 PIECE 10	Valve Seat
2641-746 PIECE 21Q3	Valve Seat
2641-746 PIECE 24	Valve Seat
2641-746 PIECE 24Q3	Valve Seat
2642-405-15 ITEM 26	Valve Seat
2642-405-15 ITEM 26Q3	Valve Seat
56-97-0717	Valve Seat
56-97-0717Q3	Valve Seat
71201-89X3 PIECE 4DLRN	Valve Seat
71201-89X3 PIECE 4DLRNQ3	Valve Seat
76651-45X13 PIECE 9DLRN	Valve Seat
76651-45X13 PIECE 9DLRNQ3	Valve Seat
803-2178493 PIECE 02	Valve Seat
803-2178493 PIECE 02Q3	Valve Seat
803-2178493 PIECE 2Q3	Valve Seat
803-2178493-A-02	Valve Seat
803-2178493-A-02Q3	Valve Seat
810-2177483 PIECE 2	Valve Seat
810-2178493 PIECE 2Q3	Valve Seat
810-2178493PC2	Valve Seat
845-2109896PC9	Valve Seat
845-2109896PC9Q3	Valve Seat
845-4558777 ITEM 10	Valve Seat
845-4558777 ITEM 10Q3	Valve Seat
SS845-2007669PC10	Valve Seat
SS845-2007669PC10Q3	Valve Seat
SS845-2050570PC27	Valve Seat
SS845-2050570PC27Q3	Valve Seat
SS845-2050913 PC6 DLRN	Valve Seat
SS845-2050913 PIECE 38	Valve Seat
SS845-2050913 PIECE 38Q3	Valve Seat
SS845-2050913 PIECE 6DLRNQ3	Valve Seat
SS845-205234PC7 DLRN	Valve Seat
SS845-205234PC7 DLRNQ3	Valve Seat
SS845-2180757 PIECE 37	Valve Seat
SS845-2180757 PIECE 37Q3	Valve Seat
SS845-2180920 PIECE 15	Valve Seat
SS845-2180920 PIECE 15Q3	Valve Seat
SS845-2180931 PIECE 7DLRNQ3	Valve Seat
SS845-2180931PIECE7DLRN	Valve Seat
SSN671-515-2048152 PIECE 4DLRN	Valve Seat
SSN671-515-2048152PIECE4DLRNQ3	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-00-935-1581?

The FSCG of the NSN 4820-00-935-1581 is 4820

Does the NSN 4820-00-935-1581 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-935-1581 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 4820-00-935-1581 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-935-1581 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 4820-00-935-1581 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Tue, May 16, 1967