PartsTable TECHNICAL DATA SHEET

NSN 4820-01-085-1877Government record, cited

Stem, Fluid Valve4820-01-085-1877

NSN 4820-01-085-1877 · NIIN 010851877

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-085-1877 · 4820010851877 · NIIN 010851877 · 01-085-1877 · FSC 4820 Valves, Nonpowered · 2641-809-42 · 2641-809-42 ITEM 68 · 845-4558743 ITEM 35

Nearby stock numbers ← 4820-01-085-1853 · 4820-01-085-1878 →

4820-01-085-1877 — Valves, Nonpowered

Features

Stem,fluid Valve — FSC 4820
Valve Type for Which Designed: BALL
Largest Outside Diameter: 0.700 INCHES NOMINAL IN
Stem Actuating End Type: THREADED EXTERNALLY
Material Document and Classification: MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE
Material: COPPER ALLOY

Identification

NSN: 4820-01-085-1877
NIIN: 010851877
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-085-1877, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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	4820-01-085-1877
Item Name	Stem,fluid Valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Valve Type for Which Designed	BALL
Largest Outside Diameter	0.700 INCHES NOMINAL IN
Stem Actuating End Type	THREADED EXTERNALLY
Material Document and Classification	MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE
Material	COPPER ALLOY

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 5

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

4820-01-093-73952641-809-42 ITEM 34 POSSIBLE MATCH

STEM,FLUID VALVE

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

4820-01-105-00022641-809-42 ITEM 82 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

4820-01-115-09712641-809-42 ITEM 84 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

4820-01-115-10132641-809-42 ITEM 78 POSSIBLE MATCH

STEM,FLUID VALVE

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

4820-01-124-27882641-809-42 ITEM 80 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
2641-809-42	D/9 Drawing number reference only U.S. Government activity
2641-809-42 ITEM 68	3/2 Design control — primary reference U.S. Government activity
845-4558743 ITEM 35	5/2 Secondary reference U.S. Government activity

Related Parts

4820-01-093-7395POSSIBLE MATCH

STEM,FLUID VALVE

2641-809-42 ITEM 34

4820-01-105-0002POSSIBLE MATCH

DISK,VALVE

2641-809-42 ITEM 82

4820-01-115-0971POSSIBLE MATCH

DISK,VALVE

2641-809-42 ITEM 84

4820-01-115-1013POSSIBLE MATCH

STEM,FLUID VALVE

2641-809-42 ITEM 78

4820-01-124-2788POSSIBLE MATCH

DISK,VALVE

2641-809-42 ITEM 80

Frequently Asked Questions

What is NSN 4820-01-085-1877?

NSN 4820-01-085-1877 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-085-1877?

5 possible matches (shared part number, not a government interchangeability claim): 4820-01-093-7395, 4820-01-105-0002, 4820-01-115-0971. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-085-1877?

Key specifications for 4820-01-085-1877: Valve Type for Which Designed: BALL; Largest Outside Diameter: 0.700 INCHES NOMINAL IN; Stem Actuating End Type: THREADED EXTERNALLY; Material Document and Classification: MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE. 5 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-085-1877 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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