PartsTable TECHNICAL DATA SHEET

NSN 4820-01-416-4050Government record, cited

Locking Device, Valv4820-01-416-4050

NSN 4820-01-416-4050 · NIIN 014164050

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-416-4050 · 4820014164050 · NIIN 014164050 · 01-416-4050 · FSC 4820 Valves, Nonpowered · 1889758 · 845-1889758ASSY · 2640-009 · 2640-009ASSY41 · 218025858

Nearby stock numbers ← 4820-01-416-3976 Cap, Valve · 4820-01-416-4054 Valve, Safety Relief →

4820-01-416-4050 — Valves, Nonpowered

Features

Locking Device,valv — FSC 4820
General Characteristics Item Description: NICKEL COPPER ALLOY; BRAIDED 0.125 IN. DIA; BOLT-EYE SHOULDER 0.250 IN. BY 2.000 IN. LOCKED OPEN; NICKEL COPPER ALLOY BARREL SPACER IN

Identification

NSN: 4820-01-416-4050
NIIN: 014164050
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Locking Device,valv, cataloged under National Stock Number 4820-01-416-4050, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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.

Technical Specifications

Parameter	Value
NSN	4820-01-416-4050
Item Name	Locking Device,valv
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
General Characteristics Item Description	NICKEL COPPER ALLOY; BRAIDED 0.125 IN. DIA; BOLT-EYE SHOULDER 0.250 IN. BY 2.000 IN. LOCKED OPEN; NICKEL COPPER ALLOY BARREL SPACER IN

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.

4820-01-416-4055845-1889758ASSY42 POSSIBLE MATCH

LOCKING DEVICE,VALV

Possible match (shared part number)Naval Ship Systems Command

4820-01-418-0975845-1889758ASSY5 POSSIBLE MATCH

LOCKING DEVICE,VALV

Possible match (shared part number)Naval Ship Systems Command

4820-01-418-40302640-009ASSY6 POSSIBLE MATCH

LOCKING DEVICE,VALV

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

4820-01-418-5162845-1889758ASSY8 POSSIBLE MATCH

LOCKING DEVICE,VALVE

Possible match (shared part number)Naval Ship Systems Command

4820-01-504-74232640-009 ASSY 33 POSSIBLE MATCH

LOCK,STEM,VALVE

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

4820-01-509-0768845-1889758ASSY35 POSSIBLE MATCH

LOCKING DEVICE VALV

Possible match (shared part number)Naval Sea Systems Command

4820-01-509-0770845-1889758ASSY34 POSSIBLE MATCH

LOCKING DEVICE VALV

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

4820-01-541-6160845-1889758 ASSY 31 POSSIBLE MATCH

LOCK,STEM,VALVE

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
1889758	D/9 Drawing number reference only U.S. Government activity
845-1889758ASSY	C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command
2640-009	D/9 Drawing number reference only U.S. Government activity
2640-009ASSY41	5/9 Secondary reference U.S. Government activity
218025858	3/2 Design control — primary reference U.S. Government activity
845-1889758ASSY41	5/2 Secondary reference U.S. Government activity

Related Parts

4820-01-416-4055POSSIBLE MATCH

LOCKING DEVICE,VALV

845-1889758ASSY42

4820-01-418-0975POSSIBLE MATCH

LOCKING DEVICE,VALV

845-1889758ASSY5

4820-01-418-4030POSSIBLE MATCH

LOCKING DEVICE,VALV

2640-009ASSY6

4820-01-418-5162POSSIBLE MATCH

LOCKING DEVICE,VALVE

845-1889758ASSY8

4820-01-504-7423POSSIBLE MATCH

LOCK,STEM,VALVE

2640-009 ASSY 33

4820-01-509-0768POSSIBLE MATCH

LOCKING DEVICE VALV

845-1889758ASSY35

4820-01-509-0770POSSIBLE MATCH

LOCKING DEVICE VALV

845-1889758ASSY34

4820-01-541-6160POSSIBLE MATCH

LOCK,STEM,VALVE

845-1889758 ASSY 31

Frequently Asked Questions

What is NSN 4820-01-416-4050?

NSN 4820-01-416-4050 is a Locking Device,valv, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-416-4050?

8 possible matches (shared part number, not a government interchangeability claim): 4820-01-416-4055, 4820-01-418-0975, 4820-01-418-4030. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-416-4050?

Key specifications for 4820-01-416-4050: General Characteristics Item Description: NICKEL COPPER ALLOY; BRAIDED 0.125 IN. DIA; BOLT-EYE SHOULDER 0.250 IN. BY 2.000 IN. LOCKED OPEN; NICKEL COPPER ALLOY BARREL SPACER IN; End Item Identification: SEAWOLF CLASS SSN. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-416-4050 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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