PartsTable TECHNICAL DATA SHEET

NSN 4820-01-240-1985Government record, cited

Valve, Bleeder, Hydraulic System4820-01-240-1985

NSN 4820-01-240-1985 · NIIN 012401985 · Part number W21666-7

Titan Wheel Corp of Virginia · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 64441

Government record, cited

NSN 4820-01-240-1985 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-240-1985. Manufacturer of record part number: W21666-7.

Also searched as 4820-01-240-1985 · 4820012401985 · NIIN 012401985 · 01-240-1985 · FSC 4820 Valves, Nonpowered · CAGE 64441 · W21666-7 · 3K2316 · W1666 PIECE 6 · W21666

Nearby stock numbers ← 4820-01-240-1970 Valve Assembly, Root · 4820-01-240-1986 Stem, Fluid Valve →

4820-01-240-1985 — Valves, Nonpowered

Features

Valve,bleeder,hydraulic System — FSC 4820
3 manufacturer part numbers on file
Manufacturer of record: Titan Wheel Corp of Virginia

Identification

NSN: 4820-01-240-1985
NIIN: 012401985
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: W21666-7
Manufacturer: Titan Wheel Corp of Virginia

General Description

The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-240-1985, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Titan Wheel Corp of Virginia. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Catalog Facts

Item Name	Valve,bleeder,hydraulic System
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Titan Wheel Corp of Virginia (CAGE 64441)

Technical Specifications

Parameter	Value
NSN	4820-01-240-1985
Primary Part Number	W21666-7
Item Name	Valve,bleeder,hydraulic System
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Titan Wheel Corp of Virginia
Status	ACTIVE

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
3K2316	Caterpillar Inc Div Caterpillar Defense (USA)
W1666 PIECE 6	Titan Wheel Corp of Virginia (USA)
W21666-7 PRIMARY	Titan Wheel Corp of Virginia (USA)

Reference documents

Reference	Meaning
W21666	D/9 Drawing number reference only Titan Wheel Corp of Virginia

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 4820-01-240-1985?

NSN 4820-01-240-1985 is a Valve,bleeder,hydraulic System, manufactured by Titan Wheel Corp of Virginia, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-240-1985?

NSN 4820-01-240-1985 has 3 manufacturer part numbers on file: 3K2316 (Caterpillar Inc Div Caterpillar Defense), W1666 PIECE 6 (Titan Wheel Corp of Virginia), W21666-7 (Titan Wheel Corp of Virginia).

Is NSN 4820-01-240-1985 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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