The Gear Rack, cataloged under National Stock Number 3020-01-382-6593, 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 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-382-6593 |
| Primary Part Number | 6641190 FNA5 |
| Item Name | Gear Rack |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Teeth Quantity | 8 |
| Teeth Type | SPUR |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 8.390 INCHES IN |
| Material Document and Classification | AISI4140 ASSN STD 1ST MATERIAL RESPONSE OR AISI4340 ASSN STD 2ND MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 3RD MATERIAL RESPONSE OVERALL |
| Tooth Form | SPECIAL |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 OVERALL |
| 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 |
|---|---|
| 801-6641190FNA5 | Naval Sea Systems Command (USA) |
| 6641190 FNA5 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2643-930-53FNA5 | 5/2 Secondary reference U.S. Government activity |
| 6641190 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-382-6593 is a Gear Rack, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-382-6593 has 2 manufacturer part numbers on file: 801-6641190FNA5 (Naval Sea Systems Command), 6641190 FNA5 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-382-6621. Verify interchangeability with system specifications before substitution.
Key specifications for 6641190 FNA5: Teeth Quantity: 8; Teeth Type: SPUR; Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL; Nominal Overall Length: 8.390 INCHES IN. 8 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.