PartsTable TECHNICAL DATA SHEET

NSN 4820-01-180-2901Government record, cited

Seat, Valve4820-01-180-2901

NSN 4820-01-180-2901 · NIIN 011802901 · Part number N-7343B

Metrex Valve Corp. Dba Metrex Valve Corp · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 21013

Government record, cited

NSN 4820-01-180-2901 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-180-2901. Manufacturer of record part number: N-7343B.

Also searched as 4820-01-180-2901 · 4820011802901 · NIIN 011802901 · 01-180-2901 · FSC 4820 Valves, Nonpowered · CAGE 21013 · N-7343B · N-7343

Nearby stock numbers ← 4820-01-180-2864 Valve, Ball · 4820-01-180-2902 Seat, Valve →

4820-01-180-2901 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.873 INCHES NOMINAL IN
Flange Diameter: 0.981 INCHES NOMINAL IN
Body Outside Diameter: 0.803 INCHES NOMINAL IN
Seal Accommodation Type: GROOVED
Body Stepped Inside Diameter: 0.497 INCHES NOMINAL FIRST STEP IN
Body Stepped Inside Diameter: 0.754 INCHES NOMINAL SECOND STEP IN
Style Designator: PLAIN FLANGED

Identification

NSN: 4820-01-180-2901
NIIN: 011802901
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: N-7343B
Manufacturer: Metrex Valve Corp. Dba Metrex Valve Corp

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-180-2901, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Metrex Valve Corp. Dba Metrex Valve Corp. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-180-2901
Primary Part Number	N-7343B
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Metrex Valve Corp. Dba Metrex Valve Corp
Status	ACTIVE
Flange Seat to Disk End Height	0.873 INCHES NOMINAL IN
Flange Diameter	0.981 INCHES NOMINAL IN
Body Outside Diameter	0.803 INCHES NOMINAL IN
Seal Accommodation Type	GROOVED
Body Stepped Inside Diameter	0.497 INCHES NOMINAL FIRST STEP IN
Body Stepped Inside Diameter	0.754 INCHES NOMINAL SECOND STEP IN
Style Designator	PLAIN FLANGED
Under Flange Height	0.224 INCHES NOMINAL IN
Material	STEEL CORROSION RESISTING OVERALL
Seat Angle in Deg	45.000 NOMINAL
Seating Surface Shape	ANGULAR

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
N-7343B PRIMARY	Metrex Valve Corp. Dba Metrex Valve Corp (USA)

Reference documents

Reference	Meaning
N-7343	5/9 Secondary reference Metrex Valve Corp. Dba Metrex Valve Corp

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-180-2901?

NSN 4820-01-180-2901 is a Seat,valve, manufactured by Metrex Valve Corp. Dba Metrex Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-180-2901?

NSN 4820-01-180-2901 has 1 manufacturer part number on file: N-7343B (Metrex Valve Corp. Dba Metrex Valve Corp).

What are the specifications of N-7343B?

Key specifications for N-7343B: Flange Seat to Disk End Height: 0.873 INCHES NOMINAL IN; Flange Diameter: 0.981 INCHES NOMINAL IN; Body Outside Diameter: 0.803 INCHES NOMINAL IN; Seal Accommodation Type: GROOVED. 11 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-180-2901 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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