Seat, Valve4820-01-142-7935

NSN 4820-01-142-7935 · NIIN 011427935

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-142-7935 · 4820011427935 · NIIN 011427935 · 01-142-7935 · FSC 4820 Valves, Nonpowered · SS845-2050570PIECE 9 · 2640-337X1 PIECE 9 · 2640-337X1 · SS845-2050570

Nearby stock numbers ← 4820-01-142-7933 Valve, Plug · 4820-01-142-7938 Valve, Trip →

4820-01-142-7935 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Body Outside Diameter: 3.875 INCHES NOMINAL IN
Style Designator: PLAIN
Body Inside Diameter: 3.500 INCHES NOMINAL IN
Material: NICKEL ALLOY OVERALL
Seat Angle in Deg: 45.000 NOMINAL
Seating Surface Shape: ANGULAR

Identification

NSN: 4820-01-142-7935
NIIN: 011427935
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-142-7935, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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	4820-01-142-7935
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Body Outside Diameter	3.875 INCHES NOMINAL IN
Style Designator	PLAIN
Body Inside Diameter	3.500 INCHES NOMINAL IN
Material	NICKEL ALLOY OVERALL
Seat Angle in Deg	45.000 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.

4820-01-147-49522640-337X1ASSYA POSSIBLE MATCH

VALVE,BALL

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

Cross-Reference Index

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

Reference documents

Reference	Meaning
SS845-2050570PIECE 9	3/2 Design control — primary reference U.S. Government activity
2640-337X1 PIECE 9	3/2 Design control — primary reference U.S. Government activity
2640-337X1	D/9 Drawing number reference only U.S. Government activity
SS845-2050570	D/9 Drawing number reference only U.S. Government activity

Related Parts

4820-01-147-4952POSSIBLE MATCH

VALVE,BALL

2640-337X1ASSYA

Frequently Asked Questions

What is NSN 4820-01-142-7935?

NSN 4820-01-142-7935 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-142-7935?

1 possible match (shared part number, not a government interchangeability claim): 4820-01-147-4952. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-142-7935?

Key specifications for 4820-01-142-7935: Overall Height: 0.359 INCHES NOMINAL IN; Body Outside Diameter: 3.875 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 3.500 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-142-7935 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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