PartsTable TECHNICAL DATA SHEET

NSN 4820-01-199-8159Government record, cited

Disk, Valve4820-01-199-8159

NSN 4820-01-199-8159 · NIIN 011998159 · Part number 736991

Rtx Corporation Div Pratt & Whitney · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 55820

Government record, cited

NSN 4820-01-199-8159 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-199-8159. Manufacturer of record part number: 736991.

Also searched as 4820-01-199-8159 · 4820011998159 · NIIN 011998159 · 01-199-8159 · FSC 4820 Valves, Nonpowered · CAGE 55820 · 736991

Nearby stock numbers ← 4820-01-199-8098 · 4820-01-199-8160 Disk, Valve →

4820-01-199-8159 — Valves, Nonpowered

Features

Disk,valve — FSC 4820
2 manufacturer part numbers on file
Manufacturer of record: Rtx Corporation Div Pratt & Whitney

Identification

NSN: 4820-01-199-8159
NIIN: 011998159
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 736991
Manufacturer: Rtx Corporation Div Pratt & Whitney

General Description

The Disk,valve, cataloged under National Stock Number 4820-01-199-8159, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Disk,valve
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Ontic Engineering & Manufacturing, Inc Dba Ontic Us (CAGE 45934); Rtx Corporation Div Pratt & Whitney (CAGE 55820)

Technical Specifications

Parameter	Value
NSN	4820-01-199-8159
Primary Part Number	736991
Item Name	Disk,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Rtx Corporation Div Pratt & Whitney
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
736991	Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
736991 PRIMARY	Rtx Corporation Div Pratt & Whitney (USA)

Reference documents

Reference	Meaning
736991	5/9 Secondary reference U.S. Government activity
736991	5/1 Secondary reference Meggitt North Hollywood 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 4820-01-199-8159?

NSN 4820-01-199-8159 is a Disk,valve, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-199-8159?

NSN 4820-01-199-8159 has 2 manufacturer part numbers on file: 736991 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 736991 (Rtx Corporation Div Pratt & Whitney).

Is NSN 4820-01-199-8159 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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