The Gear,helical, cataloged under National Stock Number 3020-01-225-6984, 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 Lake Shore Systems, Inc.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-225-6984 |
| Primary Part Number | 177172 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 EXTERNALLY LUBRICATED BEARING |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | DOUBLE HELIX, SOLID |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 39.2500 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Material | STEEL OVERALL |
| Face Nominal Width | 5.000 INCHES 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 |
|---|---|
| 177172 PRIMARY | Lake Shore Systems, Inc. (USA) |
| 39394 PIECE 27 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 39394 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 3020-01-225-6984 is a Gear,helical, manufactured by Lake Shore Systems, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-225-6984 has 2 manufacturer part numbers on file: 177172 (Lake Shore Systems, Inc.), 39394 PIECE 27 (Lake Shore Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-225-6994. Verify interchangeability with system specifications before substitution.
Key specifications for 177172: Furnished Items and Quantity: 1 EXTERNALLY LUBRICATED BEARING; Body Style: WEBBED, WITH LIGHTENING HOLES; Bore Style: W/ KEYWAY BOTH ENDS; Teeth Type: DOUBLE HELIX, SOLID. 9 specifications are 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.