The Gear,spur, cataloged under National Stock Number 3020-00-287-8261, 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 18 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 26 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-287-8261 |
| Primary Part Number | 212-45-010PC7 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.156 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.437 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.051 INCHES FIRST END IN |
| Teeth Quantity | 39 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.750 INCHES FIRST END IN |
| Hardness Rating | 60.0 ROCKWELL C NOMINAL OVERALL |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | MIL-S-890,ALLOY NO. 3 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.2460 INCHES MINIMUM AND 3.2480 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 3.375 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.874 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.235 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 |
|---|---|
| 212-45-010PC7 PRIMARY | Naval Sea Systems Command (USA) |
| 285-45-15PC7 PRIMARY | Naval Sea Systems Command (USA) |
| 212-45-011PC7 PRIMARY | Naval Sea Systems Command (USA) |
| 253-45-01PC7 PRIMARY | Naval Sea Systems Command (USA) |
| 253-45-02PC7 PRIMARY | Naval Sea Systems Command (USA) |
| 228-45-035PC7 PRIMARY | Naval Sea Systems Command (USA) |
| 285-45-141PC7 PRIMARY | Naval Sea Systems Command (USA) |
| 228-45-036PC7 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 3156SH25PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 228-45-035PC7 | 5/9 Secondary reference U.S. Government activity |
| 3156SH17PC7 | 5/9 Secondary reference General Signal Corp |
| N1691-7FS | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 3156SH21PC7 | 5/9 Secondary reference General Signal Corp |
| 212-45-011PC7 | 5/9 Secondary reference U.S. Government activity |
| 285-45-141PC7 | 5/9 Secondary reference U.S. Government activity |
| 3156SH13PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 3156SH18PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 253-45-02PC7 | 5/9 Secondary reference U.S. Government activity |
| 3156SH14PC7 | 5/9 Secondary reference General Signal Corp |
| 3156SH26PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 3156SH17PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 3156SH21PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 3156SH14PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 3156SH22PC7 | 5/9 Secondary reference Tuthill Corporation Dba Tuthill Vac & Blower Systems Div Tuthill Vacuum Systems |
| 228-45-036PC7 | 5/9 Secondary reference U.S. Government activity |
| 3156SH18PC7 | 5/9 Secondary reference General Signal Corp |
| 3156SH26PC7 | 5/9 Secondary reference General Signal Corp |
| 3156SH13PC7 | 5/9 Secondary reference General Signal Corp |
NSN 3020-00-287-8261 is a Gear,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-287-8261 has 8 manufacturer part numbers on file: 212-45-010PC7 (Naval Sea Systems Command), 285-45-15PC7 (Naval Sea Systems Command), 212-45-011PC7 (Naval Sea Systems Command), 253-45-01PC7 (Naval Sea Systems Command), 253-45-02PC7 (Naval Sea Systems Command) and 3 more.
Key specifications for 212-45-010PC7: Keyway Nominal Width: 0.156 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.437 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.051 INCHES FIRST END IN; Teeth Quantity: 39. 18 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.