The Gear,helical, cataloged under National Stock Number 3020-01-428-4348, 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 W.w. Grainger, Inc. Div Government Sales Division. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-428-4348 |
| Primary Part Number | B139429 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | W.w. Grainger, Inc. Div Government Sales Division |
| Status | ACTIVE |
| Bore Style | PLAIN BOTH ENDS |
| 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 |
|---|---|
| B139429 PRIMARY | W.w. Grainger, Inc. Div Government Sales Division (USA) |
| FORM5S1878FIG10REF24 | W.w. Grainger, Inc. Div Government Sales Division (USA) |
| Reference | Meaning |
|---|---|
| B139429 | 5/9 Secondary reference Blume Worldwide Services |
NSN 3020-01-428-4348 is a Gear,helical, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-428-4348 has 2 manufacturer part numbers on file: B139429 (W.w. Grainger, Inc. Div Government Sales Division), FORM5S1878FIG10REF24 (W.w. Grainger, Inc. Div Government Sales Division).
Key specifications for B139429: Bore Style: PLAIN BOTH ENDS; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 1 specification is 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.