The Gear,helical, cataloged under National Stock Number 3020-01-261-7995, 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 Waterous Company. Government technical data includes 5 specifications, 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 | 3020-01-261-7995 |
| Primary Part Number | 61690 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Waterous Company |
| Status | ACTIVE |
| Teeth Quantity | 25 |
| Nominal Overall Length | 2.937 INCHES IN |
| Nominal Outside Diameter | 2.242 INCHES IN |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.625 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 |
|---|---|
| 61690 PRIMARY | Waterous Company (USA) |
NSN 3020-01-261-7995 is a Gear,helical, manufactured by Waterous Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-261-7995 has 1 manufacturer part number on file: 61690 (Waterous Company).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-275-5257. Verify interchangeability with system specifications before substitution.
Key specifications for 61690: Teeth Quantity: 25; Nominal Overall Length: 2.937 INCHES IN; Nominal Outside Diameter: 2.242 INCHES IN; Material: STEEL OVERALL. 5 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.