The Gear,friction, cataloged under National Stock Number 3020-00-736-5855, 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 Thales Usa, Inc. Div Air Mobility Solutions ("ams"). 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-736-5855 |
| Primary Part Number | 72521-1 |
| Item Name | Gear,friction |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Thales Usa, Inc. Div Air Mobility Solutions ("ams") |
| Status | ACTIVE |
| General Characteristics Item Description | C/O PIN GROOVE TYPE 1 0.047 IN. DIA,0.312 IN. IN. LG 2,GEAR LOCK 1,GEAR WAFER DRIVE 1,0.527 IN. DIA O/A IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 72521-1 PRIMARY | Thales Usa, Inc. Div Air Mobility Solutions ("ams") (USA) |
| Reference | Meaning |
|---|---|
| 72521-1 | 5/9 Secondary reference Signxpress Div Dave Setren |
NSN 3020-00-736-5855 is a Gear,friction, manufactured by Thales Usa, Inc. Div Air Mobility Solutions ("ams"), classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-736-5855 has 1 manufacturer part number on file: 72521-1 (Thales Usa, Inc. Div Air Mobility Solutions ("ams")).
2 possible matches (shared part number, not a government interchangeability claim): 6115-01-049-0973, 2840-01-261-3037. Verify interchangeability with system specifications before substitution.
Key specifications for 72521-1: General Characteristics Item Description: C/O PIN GROOVE TYPE 1 0.047 IN. DIA,0.312 IN. IN. LG 2,GEAR LOCK 1,GEAR WAFER DRIVE 1,0.527 IN. DIA O/A IN. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.