Seat, Valve4820-01-396-4989

NSN 4820-01-396-4989 · NIIN 013964989 · Part number BYLB 1245

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

Government record, cited

NSN 4820-01-396-4989 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-396-4989. Manufacturer of record part number: BYLB 1245.

Also searched as 4820-01-396-4989 · 4820013964989 · NIIN 013964989 · 01-396-4989 · FSC 4820 Valves, Nonpowered · CAGE 05624 · BYLB 1245

Nearby stock numbers ← 4820-01-396-4732 Retainer, Disk, Valve · 4820-01-396-4992 Piston, Valve →

4820-01-396-4989 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Ge Aviation Systems Llc Dba Ge Aviation Systems Llc

Identification

NSN: 4820-01-396-4989
NIIN: 013964989
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: BYLB 1245
Manufacturer: Ge Aviation Systems Llc Dba Ge Aviation Systems Llc

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-396-4989, 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. 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	4820-01-396-4989
Primary Part Number	BYLB 1245
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Ge Aviation Systems Llc Dba Ge Aviation Systems 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)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
BYLB 1245 PRIMARY	Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (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 4820-01-396-4989?

NSN 4820-01-396-4989 is a Seat,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 4820-01-396-4989?

NSN 4820-01-396-4989 has 1 manufacturer part number on file: BYLB 1245 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).

What are the specifications of BYLB 1245?

Key specifications for BYLB 1245: End Item Identification: 4810-01-243-1099. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-396-4989 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.

PartsTable Design LLC · partstable.com