PartsTable TECHNICAL DATA SHEET

NSN 4820-01-486-2769Government record, cited

Seat, Valve4820-01-486-2769

NSN 4820-01-486-2769 · NIIN 014862769 · Part number JMS-3421

Clark-Reliance Llc Dba Jerguson Gage & Valve · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 74965

Government record, cited

NSN 4820-01-486-2769 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-486-2769. Manufacturer of record part number: JMS-3421.

Also searched as 4820-01-486-2769 · 4820014862769 · NIIN 014862769 · 01-486-2769 · FSC 4820 Valves, Nonpowered · CAGE 74965 · JMS-3421 · IC-6493 SHT 4 PIECE NO.2 · IC-6493 · IC-6493 SHT 3 PIECE NO.2

Nearby stock numbers ← 4820-01-486-2759 Body, Valve · 4820-01-486-2773 Valve, Flow Control →

4820-01-486-2769 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
3 manufacturer part numbers on file
Manufacturer of record: Clark-Reliance Llc Dba Jerguson Gage & Valve

Identification

NSN: 4820-01-486-2769
NIIN: 014862769
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: JMS-3421
Manufacturer: Clark-Reliance Llc Dba Jerguson Gage & Valve

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-486-2769, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Clark-Reliance Llc Dba Jerguson Gage & Valve. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Seat,valve
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Clark-Reliance Llc Dba Jerguson Gage & Valve (CAGE 74965)

Technical Specifications

Parameter	Value
NSN	4820-01-486-2769
Primary Part Number	JMS-3421
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Clark-Reliance Llc Dba Jerguson Gage & Valve
Status	ACTIVE

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

⇄ Related Items 8

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4820-01-486-2773JMS-4782 POSSIBLE MATCH

VALVE,FLOW CONTROL

Possible match (shared part number)Clark-Reliance Llc Dba Jerguson Gage & Valve

4820-01-486-2779JMS-7328 POSSIBLE MATCH

STEM,FLUID VALVE

Possible match (shared part number)Clark-Reliance Llc Dba Jerguson Gage & Valve

4820-01-486-2784JMS-4657 POSSIBLE MATCH

BALL,CHECK

Possible match (shared part number)Clark-Reliance Llc Dba Jerguson Gage & Valve

4820-01-486-2803JMS-4743 POSSIBLE MATCH

VALVE,ANGLE

Possible match (shared part number)Clark-Reliance Llc Dba Jerguson Gage & Valve

6680-01-486-3331JMS-8453 POSSIBLE MATCH

INDICATOR,SIGHT,LIQUID

Possible match (shared part number)Clark-Reliance Llc

6680-01-486-3357JMS-4725 POSSIBLE MATCH

INDICATOR,SIGHT,LIQUID

Possible match (shared part number)Clark-Reliance Llc

6680-01-486-3476CMS-8492 POSSIBLE MATCH

PARTS KIT,SIGHT INDICATOR

Possible match (shared part number)Clark-Reliance Llc

6680-01-486-3674JMS-0231 POSSIBLE MATCH

PARTS KIT,SIGHT INDICATOR

Possible match (shared part number)Clark-Reliance Llc

Cross-Reference Index

Part Number	Manufacturer
JMS-3421 PRIMARY	Clark-Reliance Llc Dba Jerguson Gage & Valve (USA)
IC-6493 SHT 4 PIECE NO.2	Clark-Reliance Llc Dba Jerguson Gage & Valve (USA)
IC-6493 SHT 3 PIECE NO.2	Clark-Reliance Llc Dba Jerguson Gage & Valve (USA)

Reference documents

Reference	Meaning
IC-6493	D/9 Drawing number reference only Clark-Reliance Llc Dba Jerguson Gage & Valve

Related Parts

4820-01-486-2773POSSIBLE MATCH

VALVE,FLOW CONTROL

JMS-4782

4820-01-486-2779POSSIBLE MATCH

STEM,FLUID VALVE

JMS-7328

4820-01-486-2784POSSIBLE MATCH

BALL,CHECK

JMS-4657

4820-01-486-2803POSSIBLE MATCH

VALVE,ANGLE

JMS-4743

6680-01-486-3331POSSIBLE MATCH

INDICATOR,SIGHT,LIQUID

JMS-8453

6680-01-486-3357POSSIBLE MATCH

INDICATOR,SIGHT,LIQUID

JMS-4725

6680-01-486-3476POSSIBLE MATCH

PARTS KIT,SIGHT INDICATOR

CMS-8492

6680-01-486-3674POSSIBLE MATCH

PARTS KIT,SIGHT INDICATOR

JMS-0231

Frequently Asked Questions

What is NSN 4820-01-486-2769?

NSN 4820-01-486-2769 is a Seat,valve, manufactured by Clark-Reliance Llc Dba Jerguson Gage & Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-486-2769?

NSN 4820-01-486-2769 has 3 manufacturer part numbers on file: JMS-3421 (Clark-Reliance Llc Dba Jerguson Gage & Valve), IC-6493 SHT 4 PIECE NO.2 (Clark-Reliance Llc Dba Jerguson Gage & Valve), IC-6493 SHT 3 PIECE NO.2 (Clark-Reliance Llc Dba Jerguson Gage & Valve).

What NSN replaces 4820-01-486-2769?

8 possible matches (shared part number, not a government interchangeability claim): 4820-01-486-2773, 4820-01-486-2779, 4820-01-486-2784. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-486-2769 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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