Seat, Valve4820-01-018-9026

NSN 4820-01-018-9026 · NIIN 010189026

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-018-9026 · 4820010189026 · NIIN 010189026 · 01-018-9026 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-01-018-8336 · 4820-01-018-9040 →

4820-01-018-9026 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.218 INCHES NOMINAL IN
Flange Diameter: 5.500 INCHES NOMINAL IN
Body Outside Diameter: 4.165 INCHES NOMINAL IN
Style Designator: PLAIN FLANGED
Body Inside Diameter: 3.050 INCHES NOMINAL IN
Under Flange Height: 0.250 INCHES NOMINAL IN
Material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL

Identification

NSN: 4820-01-018-9026
NIIN: 010189026
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-018-9026, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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	4820-01-018-9026
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flange Seat to Disk End Height	0.218 INCHES NOMINAL IN
Flange Diameter	5.500 INCHES NOMINAL IN
Body Outside Diameter	4.165 INCHES NOMINAL IN
Style Designator	PLAIN FLANGED
Body Inside Diameter	3.050 INCHES NOMINAL IN
Under Flange Height	0.250 INCHES NOMINAL IN
Material	PLASTIC POLYTETRAFLUOROETHYLENE OVERALL
Seat Angle in Deg	30.000 NOMINAL
Seating Surface Shape	ANGULAR

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 1

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

4820-01-241-4138 POSSIBLE MATCH

SEAT,VALVE

Possible match (shared part number)

Cross-Reference Index

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

Reference documents

Reference	Meaning
B1363	3/9 Design control — primary reference P J Valves Inc

Related Parts

4820-01-241-4138POSSIBLE MATCH

SEAT,VALVE

Frequently Asked Questions

What is NSN 4820-01-018-9026?

NSN 4820-01-018-9026 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-018-9026?

1 possible match (shared part number, not a government interchangeability claim): 4820-01-241-4138. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-018-9026?

Key specifications for 4820-01-018-9026: Flange Seat to Disk End Height: 0.218 INCHES NOMINAL IN; Flange Diameter: 5.500 INCHES NOMINAL IN; Body Outside Diameter: 4.165 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 9 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-018-9026 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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