Disk, Valve4820-00-138-1997

NSN 4820-00-138-1997 · NIIN 001381997

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-00-138-1997 · 4820001381997 · NIIN 001381997 · 00-138-1997 · FSC 4820 Valves, Nonpowered · 50074A50 · 20-0625

Nearby stock numbers ← 4820-00-138-1994 Seat, Valve · 4820-00-138-2001 Valve, Third Stage S →

4820-00-138-1997 — Valves, Nonpowered

Features

Disk,valve — FSC 4820
Outside Diameter: 0.812 INCHES NOMINAL IN
Style Designator: PLAIN
Inside Diameter: 0.375 INCHES NOMINAL IN
Material: RUBBER SYNTHETIC

Identification

NSN: 4820-00-138-1997
NIIN: 001381997
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Disk,valve, cataloged under National Stock Number 4820-00-138-1997, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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	4820-00-138-1997
Item Name	Disk,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Outside Diameter	0.812 INCHES NOMINAL IN
Style Designator	PLAIN
Inside Diameter	0.375 INCHES NOMINAL IN
Material	RUBBER SYNTHETIC

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 2

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

5307-00-359-8813 POSSIBLE MATCH

STUD

Possible match (shared part number)

5340-01-208-7825NAS844-18 POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

Cross-Reference Index

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

Reference documents

Reference	Meaning
50074A50	5/9 Secondary reference I-T-E Imperial Corp Subsidiary of Gould Inc Airmatic/beckett Harcum Div
20-0625	3/9 Design control — primary reference I-T-E Imperial Corp Subsidiary of Gould Inc Airmatic/beckett Harcum Div

Related Parts

5307-00-359-8813POSSIBLE MATCH

STUD

5340-01-208-7825POSSIBLE MATCH

CAP,PROTECTIVE,DUST AND MOISTURE

NAS844-18

Frequently Asked Questions

What is NSN 4820-00-138-1997?

NSN 4820-00-138-1997 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-00-138-1997?

2 possible matches (shared part number, not a government interchangeability claim): 5307-00-359-8813, 5340-01-208-7825. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-00-138-1997?

Key specifications for 4820-00-138-1997: Overall Height: 0.125 INCHES NOMINAL IN; Outside Diameter: 0.812 INCHES NOMINAL IN; Style Designator: PLAIN; Inside Diameter: 0.375 INCHES NOMINAL IN. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4820-00-138-1997 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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