Seat, Valve4820-01-031-8511

NSN 4820-01-031-8511 · NIIN 010318511 · Part number 2505850

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 10001

Government record, cited

NSN 4820-01-031-8511 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-031-8511. Manufacturer of record part number: 2505850.

Also searched as 4820-01-031-8511 · 4820010318511 · NIIN 010318511 · 01-031-8511 · FSC 4820 Valves, Nonpowered · CAGE 10001 · 2505850

Nearby stock numbers ← 4820-01-031-8510 Seat, Valve · 4820-01-031-8623 →

4820-01-031-8511 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Body Outside Diameter: 1.307 INCHES NOMINAL IN
Seal Accommodation Type: GROOVED
Style Designator: PLAIN
Body Inside Diameter: 0.755 INCHES NOMINAL IN
Surface Treatment: ANODIZE OVERALL
Material: ALUMINUM ALLOY 6061 OVERALL
Seating Surface Shape: FLAT

Identification

NSN: 4820-01-031-8511
NIIN: 010318511
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 2505850
Manufacturer: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-031-8511, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-031-8511
Primary Part Number	2505850
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Status	ACTIVE
Body Outside Diameter	1.307 INCHES NOMINAL IN
Seal Accommodation Type	GROOVED
Style Designator	PLAIN
Body Inside Diameter	0.755 INCHES NOMINAL IN
Surface Treatment	ANODIZE OVERALL
Material	ALUMINUM ALLOY 6061 OVERALL
Seating Surface Shape	FLAT

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
2505850 PRIMARY	Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-031-8511?

NSN 4820-01-031-8511 is a Seat,valve, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-031-8511?

NSN 4820-01-031-8511 has 1 manufacturer part number on file: 2505850 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What are the specifications of 2505850?

Key specifications for 2505850: Overall Height: 0.315 INCHES NOMINAL IN; Body Outside Diameter: 1.307 INCHES NOMINAL IN; Seal Accommodation Type: GROOVED; Style Designator: PLAIN. 7 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-031-8511 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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