The Pulley,groove, cataloged under National Stock Number 3020-01-305-2405, 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 Polytech Defense Spares Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-305-2405 |
| Primary Part Number | 5749816-003 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Polytech Defense Spares Llc |
| Status | ACTIVE |
| Groove Shape | V |
| Style Designator | PLAIN |
| Groove Quantity | 3 |
| 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 |
|---|---|
| 5749816-003 PRIMARY | Polytech Defense Spares Llc (USA) |
| 5749816-003 | Textron Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 568-5749814 PC-39 | D/9 Drawing number reference only Naval Sea Systems Command |
| 568-5749814 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-305-2405 is a Pulley,groove, manufactured by Polytech Defense Spares Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-305-2405 has 2 manufacturer part numbers on file: 5749816-003 (Polytech Defense Spares Llc), 5749816-003 (Textron Systems Corp).
1 possible match (shared part number, not a government interchangeability claim): 4710-01-316-0223. Verify interchangeability with system specifications before substitution.
Key specifications for 5749816-003: Groove Shape: V; Style Designator: PLAIN; Groove Quantity: 3. 3 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.