The Gear,helical, cataloged under National Stock Number 3020-01-356-0859, 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 Hersey Measurement Co Div of Miller Industries Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-356-0859 |
| Primary Part Number | BDN-750-A PIECE 6 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Hersey Measurement Co Div of Miller Industries Inc |
| Status | ACTIVE |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | STN-B-36 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | COPPER ALLOY 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 |
|---|---|
| BDN-750-A PIECE 6 PRIMARY | Hersey Measurement Co Div of Miller Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| BDN-750-A PIECE | 5/9 Secondary reference Hersey Measurement Co Div of Miller Industries Inc |
NSN 3020-01-356-0859 is a Gear,helical, manufactured by Hersey Measurement Co Div of Miller Industries Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-356-0859 has 1 manufacturer part number on file: BDN-750-A PIECE 6 (Hersey Measurement Co Div of Miller Industries Inc).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-363-6826. Verify interchangeability with system specifications before substitution.
Key specifications for BDN-750-A PIECE 6: Style Designator: PROTRUDING HUB; Material Document and Classification: STN-B-36 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; End Item Identification: FRESH WATER METER; Material: COPPER ALLOY OVERALL. 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.