Stem, Fluid Valve4820-00-166-6463

NSN 4820-00-166-6463 · NIIN 001666463 · Part number 51D51

Grimes Aerospace Company · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 72914

Government record, cited

NSN 4820-00-166-6463 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-166-6463. Manufacturer of record part number: 51D51.

Also searched as 4820-00-166-6463 · 4820001666463 · NIIN 001666463 · 00-166-6463 · FSC 4820 Valves, Nonpowered · CAGE 72914 · 51D51

Nearby stock numbers ← 4820-00-166-6145 Seat, Valve · 4820-00-166-6805 →

4820-00-166-6463 — Valves, Nonpowered

Features

Stem,fluid Valve — FSC 4820
Largest Outside Diameter: 0.311 INCHES NOMINAL IN
Material: STEEL CORROSION RESISTING
2 manufacturer part numbers on file
Manufacturer of record: Grimes Aerospace Company

Identification

NSN: 4820-00-166-6463
NIIN: 001666463
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 51D51
Manufacturer: Grimes Aerospace Company

General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-00-166-6463, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grimes Aerospace Company. Government technical data includes 2 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-00-166-6463
Primary Part Number	51D51
Item Name	Stem,fluid Valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Grimes Aerospace Company
Status	ACTIVE
Largest Outside Diameter	0.311 INCHES NOMINAL IN
Material	STEEL CORROSION RESISTING

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
51D51 PRIMARY	Grimes Aerospace Company (USA)
51D51	Aero International, Llc Dba Ams Engineered Solutions (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 4820-00-166-6463?

NSN 4820-00-166-6463 is a Stem,fluid Valve, manufactured by Grimes Aerospace Company, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-00-166-6463?

NSN 4820-00-166-6463 has 2 manufacturer part numbers on file: 51D51 (Grimes Aerospace Company), 51D51 (Aero International, Llc Dba Ams Engineered Solutions).

What are the specifications of 51D51?

Key specifications for 51D51: Largest Outside Diameter: 0.311 INCHES NOMINAL IN; Overall Length: 1.780 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING. 2 specifications are documented in the U.S. Government catalog.

Is NSN 4820-00-166-6463 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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