Seat, Valve4820-01-407-0791

NSN 4820-01-407-0791 · NIIN 014070791 · Part number 90-D-181-7

Derbyshire Machine & Tool Co · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 71905

Government record, cited

NSN 4820-01-407-0791 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-407-0791. Manufacturer of record part number: 90-D-181-7.

Also searched as 4820-01-407-0791 · 4820014070791 · NIIN 014070791 · 01-407-0791 · FSC 4820 Valves, Nonpowered · CAGE 71905 · 90-D-181-7 · 90-D-181 PC 7 · 90-D-181

Nearby stock numbers ← 4820-01-407-0790 Seat, Valve · 4820-01-407-0793 Valve Assembly →

4820-01-407-0791 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Body Outside Diameter: 2.750 INCHES NOMINAL IN
Body Inside Diameter: 2.250 INCHES NOMINAL IN
Material: NICKEL ALLOY SEAT
2 manufacturer part numbers on file
Manufacturer of record: Derbyshire Machine & Tool Co

Identification

NSN: 4820-01-407-0791
NIIN: 014070791
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 90-D-181-7
Manufacturer: Derbyshire Machine & Tool Co

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-407-0791, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-407-0791
Primary Part Number	90-D-181-7
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Derbyshire Machine & Tool Co
Status	ACTIVE
Body Outside Diameter	2.750 INCHES NOMINAL IN
Body Inside Diameter	2.250 INCHES NOMINAL IN
Material	NICKEL ALLOY SEAT

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

Cross-Reference Index

Part Number	Manufacturer
90-D-181 PC 7	Derbyshire Machine & Tool Co (USA)
90-D-181-7 PRIMARY	Derbyshire Machine & Tool Co (USA)

Reference documents

Reference	Meaning
90-D-181	D/9 Drawing number reference only Derbyshire Machine & Tool Co

Frequently Asked Questions

What is NSN 4820-01-407-0791?

NSN 4820-01-407-0791 is a Seat,valve, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-407-0791?

NSN 4820-01-407-0791 has 2 manufacturer part numbers on file: 90-D-181 PC 7 (Derbyshire Machine & Tool Co), 90-D-181-7 (Derbyshire Machine & Tool Co).

What are the specifications of 90-D-181-7?

Key specifications for 90-D-181-7: Overall Height: 0.500 INCHES NOMINAL IN; Body Outside Diameter: 2.750 INCHES NOMINAL IN; Body Inside Diameter: 2.250 INCHES NOMINAL IN; Special Features: WITH HIGH LIFT. 3 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-407-0791 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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