Valve, Safety Relief4820-01-662-7947

NSN 4820-01-662-7947 · NIIN 016627947 · Part number 4952455

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

Government record, cited

NSN 4820-01-662-7947 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-662-7947. Manufacturer of record part number: 4952455.

Also searched as 4820-01-662-7947 · 4820016627947 · NIIN 016627947 · 01-662-7947 · FSC 4820 Valves, Nonpowered · CAGE 55820 · 4952455

Nearby stock numbers ← 4820-01-662-7887 Regulator, Compressed Gas · 4820-01-662-7976 Adapter, Shutoff →

4820-01-662-7947 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Rtx Corporation Div Pratt & Whitney

Identification

NSN: 4820-01-662-7947
NIIN: 016627947
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 4952455
Manufacturer: Rtx Corporation Div Pratt & Whitney

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-662-7947, 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 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	4820-01-662-7947
Primary Part Number	4952455
Item Name	Valve,safety Relief
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
4952455 PRIMARY	Rtx Corporation Div Pratt & Whitney (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 4820-01-662-7947?

NSN 4820-01-662-7947 is a Valve,safety Relief, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-662-7947?

NSN 4820-01-662-7947 has 1 manufacturer part number on file: 4952455 (Rtx Corporation Div Pratt & Whitney).

What are the specifications of 4952455?

Key specifications for 4952455: Part Name Assigned by Controlling Agency: RELIEF VALVE ASSEMBLY; End Item Identification: CH-53A/D/E A. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-662-7947 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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