PartsTable TECHNICAL DATA SHEET

NSN 4820-01-311-9504Government record, cited

Cap, Valve4820-01-311-9504

NSN 4820-01-311-9504 · NIIN 013119504

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-311-9504 · 4820013119504 · NIIN 013119504 · 01-311-9504 · FSC 4820 Valves, Nonpowered · 281346-0002 · 281343 ITEM 18 · 281346-0002 ITEM 21 · 281343 · 187894-0013

Nearby stock numbers ← 4820-01-311-9503 Stem, Fluid Valve · 4820-01-311-9505 Cap, Valve →

4820-01-311-9504 — Valves, Nonpowered

Features

Cap,valve — FSC 4820

Identification

NSN: 4820-01-311-9504
NIIN: 013119504
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Cap,valve, cataloged under National Stock Number 4820-01-311-9504, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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	Cap,valve
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)

Technical Specifications

Parameter	Value
NSN	4820-01-311-9504
Item Name	Cap,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 4

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

4730-01-312-5022810-1385943 PC 6 3/8INCH POSSIBLE MATCH

NUT,UNION

Possible match (shared part number)Naval Ship Systems Command

4730-01-313-45334781311-0006 POSSIBLE MATCH

NUT,TUBE COUPLING

Possible match (shared part number)Marotta Controls Inc

4820-01-345-5552281354-0007 POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Marotta Controls Inc

4820-01-346-1650281343-0006 POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Marotta Controls Inc

Cross-Reference Index

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

Reference documents

Reference	Meaning
281346-0002	D/9 Drawing number reference only U.S. Government activity
281343 ITEM 18	5/2 Secondary reference U.S. Government activity
281346-0002 ITEM 21	5/2 Secondary reference U.S. Government activity
281343	D/9 Drawing number reference only U.S. Government activity
187894-0013	3/2 Design control — primary reference U.S. Government activity

Related Parts

4730-01-312-5022POSSIBLE MATCH

NUT,UNION

810-1385943 PC 6 3/8INCH

4730-01-313-4533POSSIBLE MATCH

NUT,TUBE COUPLING

4781311-0006

4820-01-345-5552POSSIBLE MATCH

VALVE,SAFETY RELIEF

281354-0007

4820-01-346-1650POSSIBLE MATCH

VALVE,SAFETY RELIEF

281343-0006

Frequently Asked Questions

What is NSN 4820-01-311-9504?

NSN 4820-01-311-9504 is a Cap,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-311-9504?

4 possible matches (shared part number, not a government interchangeability claim): 4730-01-312-5022, 4730-01-313-4533, 4820-01-345-5552. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-311-9504 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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