PartsTable TECHNICAL DATA SHEET

NSN 4820-01-170-5363Government record, cited

Seat, Valve4820-01-170-5363

NSN 4820-01-170-5363 · NIIN 011705363 · Part number 44B3721-59

Elliott Company Div Jeannette · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 72957

Government record, cited

NSN 4820-01-170-5363 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-170-5363. Manufacturer of record part number: 44B3721-59.

Also searched as 4820-01-170-5363 · 4820011705363 · NIIN 011705363 · 01-170-5363 · FSC 4820 Valves, Nonpowered · CAGE 72957 · 44B3721-59 · 44B3721-467D · 44B3721-467D PIECE 16A19 · 44B3021-459

Nearby stock numbers ← 4820-01-170-5362 Seat, Valve · 4820-01-170-5365 →

4820-01-170-5363 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Material: COPPER ALLOY OVERALL
2 manufacturer part numbers on file
Manufacturer of record: Elliott Company Div Jeannette

Identification

NSN: 4820-01-170-5363
NIIN: 011705363
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 44B3721-59
Manufacturer: Elliott Company Div Jeannette

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-170-5363, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Elliott Company Div Jeannette. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-170-5363
Primary Part Number	44B3721-59
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Elliott Company Div Jeannette
Status	ACTIVE
Material	COPPER ALLOY OVERALL

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 6

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

2825-01-171-479944B3721-135D POSSIBLE MATCH

HOUSING,LOWER HALF

Possible match (shared part number)Elliott Company Div Jeannette

2825-01-171-480044B3521-493B POSSIBLE MATCH

COVER,ADJUSTING SCR

Possible match (shared part number)Elliott Company Div Jeannette

2825-01-171-506144B3721-299 POSSIBLE MATCH

RETAINER,SPRING,UPPER

Possible match (shared part number)Elliott Company Div Jeannette

2825-01-171-506244B-3021-731B POSSIBLE MATCH

FLANGE,VALVE SEAT

Possible match (shared part number)Elliott Company Div Jeannette

2825-01-178-072344B3721-315 POSSIBLE MATCH

PISTON ASSEMBLY,OVERSPEED,TURBIN

Possible match (shared part number)Elliott Company Div Jeannette

4820-01-262-606444B3021-459 POSSIBLE MATCH

SEAT,VALVE

Possible match (shared part number)Elliott Company Div Jeannette

Cross-Reference Index

Part Number	Manufacturer
44B3721-59 PRIMARY	Elliott Company Div Jeannette (USA)
44B3721-467D PIECE 16A19	Carrier Corp (USA)

Reference documents

Reference	Meaning
44B3721-467D	D/9 Drawing number reference only Carrier Corp
44B3721-59	5/9 Secondary reference Carrier Corp
44B3021-459	C/1 Advisory reference — outside the item-of-supply concept Carrier Corp

Related Parts

2825-01-171-4799POSSIBLE MATCH

HOUSING,LOWER HALF

44B3721-135D

2825-01-171-4800POSSIBLE MATCH

COVER,ADJUSTING SCR

44B3521-493B

2825-01-171-5061POSSIBLE MATCH

RETAINER,SPRING,UPPER

44B3721-299

2825-01-171-5062POSSIBLE MATCH

FLANGE,VALVE SEAT

44B-3021-731B

2825-01-178-0723POSSIBLE MATCH

PISTON ASSEMBLY,OVERSPEED,TURBIN

44B3721-315

4820-01-262-6064POSSIBLE MATCH

SEAT,VALVE

44B3021-459

Frequently Asked Questions

What is NSN 4820-01-170-5363?

NSN 4820-01-170-5363 is a Seat,valve, manufactured by Elliott Company Div Jeannette, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-170-5363?

NSN 4820-01-170-5363 has 2 manufacturer part numbers on file: 44B3721-59 (Elliott Company Div Jeannette), 44B3721-467D PIECE 16A19 (Carrier Corp).

What NSN replaces 4820-01-170-5363?

6 possible matches (shared part number, not a government interchangeability claim): 2825-01-171-4799, 2825-01-171-4800, 2825-01-171-5061. Verify interchangeability with system specifications before substitution.

What are the specifications of 44B3721-59?

Key specifications for 44B3721-59: Material: COPPER ALLOY OVERALL. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-170-5363 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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