PartsTable TECHNICAL DATA SHEET

NSN 4820-01-055-0073Government record, cited

Flapper, Valve4820-01-055-0073

NSN 4820-01-055-0073 · NIIN 010550073 · Part number 42342BB

Ge Aviation Systems Llc Dba Ge Aviation Systems Llc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 05624

Government record, cited

NSN 4820-01-055-0073 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-055-0073. Manufacturer of record part number: 42342BB.

Also searched as 4820-01-055-0073 · 4820010550073 · NIIN 010550073 · 01-055-0073 · FSC 4820 Valves, Nonpowered · CAGE 05624 · 42342BB

Nearby stock numbers ← 4820-01-055-0072 Flapper, Valve · 4820-01-055-0110 →

4820-01-055-0073 — Valves, Nonpowered

Features

Flapper,valve — FSC 4820
General Characteristics Item Description: MATERIAL,42342B CASTING; HEAT TREAT PER AMS 5383
1 manufacturer part number on file
Manufacturer of record: Ge Aviation Systems Llc Dba Ge Aviation Systems Llc

Identification

NSN: 4820-01-055-0073
NIIN: 010550073
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 42342BB
Manufacturer: Ge Aviation Systems Llc Dba Ge Aviation Systems Llc

General Description

The Flapper,valve, cataloged under National Stock Number 4820-01-055-0073, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Technical Specifications

Parameter	Value
NSN	4820-01-055-0073
Primary Part Number	42342BB
Item Name	Flapper,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Ge Aviation Systems Llc Dba Ge Aviation Systems Llc
Status	ACTIVE
General Characteristics Item Description	MATERIAL,42342B CASTING; HEAT TREAT PER AMS 5383

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
42342BB PRIMARY	Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA)

Reference documents

Reference	Meaning
42342BB	5/9 Secondary reference Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S

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 4820-01-055-0073?

NSN 4820-01-055-0073 is a Flapper,valve, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-055-0073?

NSN 4820-01-055-0073 has 1 manufacturer part number on file: 42342BB (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).

What are the specifications of 42342BB?

Key specifications for 42342BB: General Characteristics Item Description: MATERIAL,42342B CASTING; HEAT TREAT PER AMS 5383; End Item Identification: F16 A/C. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-055-0073 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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