PartsTable TECHNICAL DATA SHEET

NSN 4820-01-134-3684Government record, cited

Stem, Fluid Valve4820-01-134-3684

NSN 4820-01-134-3684 · NIIN 011343684

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-134-3684 · 4820011343684 · NIIN 011343684 · 01-134-3684 · FSC 4820 Valves, Nonpowered · 2640-405X3 · SS845-2050967 · SS845-2050967 PIECE 26 · 2640-405X3 PIECE 26

Nearby stock numbers ← 4820-01-134-3683 Stem, Fluid Valve · 4820-01-134-3717 →

4820-01-134-3684 — Valves, Nonpowered

Features

Stem,fluid Valve — FSC 4820

Identification

NSN: 4820-01-134-3684
NIIN: 011343684
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-134-3684, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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	4820-01-134-3684
Item Name	Stem,fluid Valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
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 9

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

4820-01-135-9923 POSSIBLE MATCH

STEM,FLUID VALVE

Possible match (shared part number)

4820-01-141-63032640-405X3 PIECE1,4 POSSIBLE MATCH

PARTS KIT,BALL VALVE

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

4820-01-141-89442640-405X3 PIECE 28 POSSIBLE MATCH

STEM,FLUID VALVE

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

4820-01-145-42372640-405X3 PIECE 3,6 POSSIBLE MATCH

PARTS KIT,BALL VALVE

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

4820-01-146-4156SS845-2050967 PIECE 30 POSSIBLE MATCH

RETAINER,SEAT,VALVE

Possible match (shared part number)Naval Ship Systems Command

4820-01-159-29452640-405X3 PIECE27 POSSIBLE MATCH

STEM,FLUID VALVE

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

4820-01-164-71872640-405X3 PIECE 29 POSSIBLE MATCH

RETAINER,SEAT,VALVE

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

5340-01-558-9637SS845-2050967 PIECE NO 75 POSSIBLE MATCH

STRAP,RETAINING

Possible match (shared part number)Naval Ship Systems Command

5340-01-558-9642SS845-2050967 PIECE NO 77 POSSIBLE MATCH

STRAP,RETAINING

Possible match (shared part number)Naval Ship Systems Command

Cross-Reference Index

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

Reference documents

Reference	Meaning
2640-405X3	D/9 Drawing number reference only U.S. Government activity
SS845-2050967	D/9 Drawing number reference only U.S. Government activity
SS845-2050967 PIECE 26	3/2 Design control — primary reference U.S. Government activity
2640-405X3 PIECE 26	3/2 Design control — primary reference U.S. Government activity

Related Parts

4820-01-135-9923POSSIBLE MATCH

STEM,FLUID VALVE

4820-01-141-6303POSSIBLE MATCH

PARTS KIT,BALL VALVE

2640-405X3 PIECE1,4

4820-01-141-8944POSSIBLE MATCH

STEM,FLUID VALVE

2640-405X3 PIECE 28

4820-01-145-4237POSSIBLE MATCH

PARTS KIT,BALL VALVE

2640-405X3 PIECE 3,6

4820-01-146-4156POSSIBLE MATCH

RETAINER,SEAT,VALVE

SS845-2050967 PIECE 30

4820-01-159-2945POSSIBLE MATCH

STEM,FLUID VALVE

2640-405X3 PIECE27

4820-01-164-7187POSSIBLE MATCH

RETAINER,SEAT,VALVE

2640-405X3 PIECE 29

5340-01-558-9637POSSIBLE MATCH

STRAP,RETAINING

SS845-2050967 PIECE NO 75

5340-01-558-9642POSSIBLE MATCH

STRAP,RETAINING

SS845-2050967 PIECE NO 77

Frequently Asked Questions

What is NSN 4820-01-134-3684?

NSN 4820-01-134-3684 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-134-3684?

9 possible matches (shared part number, not a government interchangeability claim): 4820-01-135-9923, 4820-01-141-6303, 4820-01-141-8944. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-134-3684?

Key specifications for 4820-01-134-3684: Special Features: MATERIAL ALUMINUM BRONZE, QQ-B-679; 4.094 IN. OVERALL LENGTH; 0.622 IN. TO 0.624 IN. MAJOR DIA.; ONE END FLATTED, 0.371 TO 0.373 IN. BY 0.437 IN.; OTHER END THREAD 0.375-16 UNC 2A RIGHT HAND; FLANGE SECTION W/ 0.225 IN. NOMINAL GROOVE 0.868 TO 0.870 IN. DIA. A. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-134-3684 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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