The Gear,spur Internal-External, cataloged under National Stock Number 3020-01-189-2158, 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 Lockheed Martin Corp Electronics and Missiles Div. 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-189-2158 |
| Primary Part Number | 242642 |
| Item Name | Gear,spur Internal-External |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lockheed Martin Corp Electronics and Missiles Div |
| Status | ACTIVE |
| General Characteristics Item Description | MATL,STEEL,MIL-S-6709,FINISH PHOSPHATE,MIL-P-16232,TYPE M,CLASS 1,RC32-36CORE HDN,ONE THD HOLE,0.164-32 UNC-3B,GEAR DATA,188 TEETH,16 DIA.PITCH,20 DEG.PRESSURE ANGLE,11.7500 IN.PITCH DIA 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 |
|---|---|
| 242642 PRIMARY | Lockheed Martin Corp Electronics and Missiles Div (USA) |
NSN 3020-01-189-2158 is a Gear,spur Internal-External, manufactured by Lockheed Martin Corp Electronics and Missiles Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-189-2158 has 1 manufacturer part number on file: 242642 (Lockheed Martin Corp Electronics and Missiles Div).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-386-3327. Verify interchangeability with system specifications before substitution.
Key specifications for 242642: General Characteristics Item Description: MATL,STEEL,MIL-S-6709,FINISH PHOSPHATE,MIL-P-16232,TYPE M,CLASS 1,RC32-36CORE HDN,ONE THD HOLE,0.164-32 UNC-3B,GEAR DATA,188 TEETH,16 DIA.PITCH,20 DEG.PRESSURE ANGLE,11.7500 IN.PITCH DIA 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.