The Gear,spur, cataloged under National Stock Number 3020-01-304-1980, 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 Superior Electric Holding Group Llc Div Specialty Product Technologies. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-304-1980 |
| Primary Part Number | BD21730G21 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Superior Electric Holding Group Llc Div Specialty Product Technologies |
| Status | ACTIVE |
| Keyway Nominal Width | 0.127 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.502 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.250 INCHES FIRST END IN |
| Teeth Quantity | 54 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.375 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 2.2500 INCHES NOMINAL IN |
| Hub Style Designator | PINNED FIRST END |
| Nominal Outside Diameter | 2.333 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.316 INCHES BOTH ENDS IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 1020 OVERALL |
| Face Nominal Width | 0.250 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 |
|---|---|
| BD21730G21 PRIMARY | Superior Electric Holding Group Llc Div Specialty Product Technologies (USA) |
| Reference | Meaning |
|---|---|
| BD21730 | D/9 Drawing number reference only Superior Electric Holding Group Llc Div Specialty Product Technologies |
NSN 3020-01-304-1980 is a Gear,spur, manufactured by Superior Electric Holding Group Llc Div Specialty Product Technologies, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-304-1980 has 1 manufacturer part number on file: BD21730G21 (Superior Electric Holding Group Llc Div Specialty Product Technologies).
Key specifications for BD21730G21: Keyway Nominal Width: 0.127 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.502 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.250 INCHES FIRST END IN; Teeth Quantity: 54. 15 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.