NSN 3020-01-699-2557 · NIIN 016992557 · Part number 6519121
Naval Sea Systems Command · FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain · FSG 30 — Mechanical Power Transmission Equipment · CAGE 53711
Government record, cited
NSN 3020-01-699-2557 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-699-2557. Manufacturer of record part number: 6519121.
Also searched as3020-01-699-2557 ·
3020016992557 ·
NIIN 016992557 ·
01-699-2557 ·
FSC 3020 Gears, Pulleys, Sprockets, and Transmission Chain · CAGE 53711 · 6519121 · 8287175 · 8287175/PC19
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 6519121
Manufacturer: Naval Sea Systems Command
General Description
The Guard,mechanical Drive, cataloged under National Stock Number 3020-01-699-2557, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Guard,mechanical Drive
FSC / FSG
3020 — Gears, Pulleys, Sprockets, and Transmission Chain (FSG 30)
Manufacturers
Naval Sea Systems Command (CAGE 53711)
Technical Specifications
Parameter
Value
NSN
3020-01-699-2557
Primary Part Number
6519121
Item Name
Guard,mechanical Drive
FSC / FSG
3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
Manufacturer
Naval Sea Systems Command
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
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4710-01-699-26688288652POSSIBLE MATCH
TUBE ASSEMBLY,METAL
Possible match (shared part number)Naval Sea Systems Command
5340-01-699-32006519122POSSIBLE MATCH
PLATE,MOUNTING
Possible match (shared part number)Naval Sea Systems Command
5340-01-699-32026519112-1POSSIBLE MATCH
PLATE,MOUNTING
Possible match (shared part number)Naval Sea Systems Command
5365-01-699-35208287175 ITEM 69POSSIBLE MATCH
SPACER,PLATE
Possible match (shared part number)Naval Sea Systems Command
4730-01-699-3532POSSIBLE MATCH
PLUG,PIPE
Possible match (shared part number)
4320-01-701-28378288634POSSIBLE MATCH
PUMP,HYDRAULIC RAM,HAND DRIVEN
Possible match (shared part number)Naval Sea Systems Command
4820-01-719-2766828717-5POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Hamilton Sundstrand Corporation Dba Collins Aerospace
NSN 3020-01-699-2557 is a Guard,mechanical Drive, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
What part numbers are listed for NSN 3020-01-699-2557?
NSN 3020-01-699-2557 has 1 manufacturer part number on file: 6519121 (Naval Sea Systems Command).
What NSN replaces 3020-01-699-2557?
7 possible matches (shared part number, not a government interchangeability claim): 4710-01-699-2668, 5340-01-699-3200, 5340-01-699-3202. Verify interchangeability with system specifications before substitution.
Is NSN 3020-01-699-2557 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.