The Gear Sector,spur, cataloged under National Stock Number 3020-01-341-7621, 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. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-341-7621 |
| Primary Part Number | 6197567 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.874 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.876 INCHES FIRST END IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.750 INCHES FIRST END IN |
| First Step Nominal Length | 0.375 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 1.876 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| End Nominal Length | 0.375 INCHES FIRST END IN |
| End Nominal Diameter | 1.250 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Face Nominal Width | 0.750 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 |
|---|---|
| 6197557 PART 5 | Naval Sea Systems Command (USA) |
| 6197567 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6197557 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-341-7621 is a Gear Sector,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-341-7621 has 2 manufacturer part numbers on file: 6197557 PART 5 (Naval Sea Systems Command), 6197567 (Naval Sea Systems Command).
6 possible matches (shared part number, not a government interchangeability claim): 3020-01-341-7622, 3010-01-341-7652, 3040-01-341-7655. Verify interchangeability with system specifications before substitution.
Key specifications for 6197567: Bore Nominal Diameter: 0.874 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.876 INCHES FIRST END IN; Bore Style: PLAIN BOTH ENDS; Nominal Distance Between Body Face and Protruding Hub End: 0.750 INCHES FIRST END IN. 13 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.