PartsTable TECHNICAL DATA SHEET

NSN 4820-01-166-5266Government record, cited

Valve, Transmission4820-01-166-5266

NSN 4820-01-166-5266 · NIIN 011665266 · Part number 6770529

The W.w. Williams Company, Llc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 6H244

Government record, cited

NSN 4820-01-166-5266 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-166-5266. Manufacturer of record part number: 6770529.

Also searched as 4820-01-166-5266 · 4820011665266 · NIIN 011665266 · 01-166-5266 · FSC 4820 Valves, Nonpowered · CAGE 6H244 · 6770529

Nearby stock numbers ← 4820-01-166-5201 Valve, Check · 4820-01-166-5268 Valve Assembly, Tran →

4820-01-166-5266 — Valves, Nonpowered

Features

Valve,transmission — FSC 4820
1 manufacturer part number on file
Manufacturer of record: The W.w. Williams Company, Llc

Identification

NSN: 4820-01-166-5266
NIIN: 011665266
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 6770529
Manufacturer: The W.w. Williams Company, Llc

General Description

The Valve,transmission, cataloged under National Stock Number 4820-01-166-5266, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The W.w. Williams Company, Llc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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,transmission
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	The W.w. Williams Company, Llc (CAGE 6H244)

Technical Specifications

Parameter	Value
NSN	4820-01-166-5266
Primary Part Number	6770529
Item Name	Valve,transmission
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	The W.w. Williams Company, Llc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)

Cross-Reference Index

Part Number	Manufacturer
6770529 PRIMARY	The W.w. Williams Company, Llc (USA)

Reference documents

Reference	Meaning
6770529	5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc

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 4820-01-166-5266?

NSN 4820-01-166-5266 is a Valve,transmission, manufactured by The W.w. Williams Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-166-5266?

NSN 4820-01-166-5266 has 1 manufacturer part number on file: 6770529 (The W.w. Williams Company, Llc).

Is NSN 4820-01-166-5266 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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