The Gear,spur, cataloged under National Stock Number 3020-01-016-6791, 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 Army, United States Department of the Dba Rock Island Arsenal Jmtc. 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 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 | 3020-01-016-6791 |
| Primary Part Number | 12000539 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.070 INCHES BOTH ENDS IN |
| Teeth Quantity | 46 |
| Surface Treatment Document and Classification | MIL-STD-171,FN1.1.2.2 MIL STD SINGLE TREATMENT RESPONSE OR MIL-STD-171,FN1.1.3.2 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Hardness Rating | 29.0 ROCKWELL C MINIMUM OR 34.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | ASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A331 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.9167 INCHES NOMINAL IN |
| Nominal Outside Diameter | 1.958 INCHES IN |
| Surface Treatment | CADMIUM OVERALL |
| Pressure Angle | 30.0000 DEGREES |
| Material | STEEL COMP 4140 OR STEEL COMP 8640 OVERALL |
| Attachment Method | PRESS FIT |
| Face Nominal Width | 0.094 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 |
|---|---|
| 12000539 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 3020-01-016-6791 is a Gear,spur, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-016-6791 has 1 manufacturer part number on file: 12000539 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
1 possible match (shared part number, not a government interchangeability claim): 5935-01-092-6537. Verify interchangeability with system specifications before substitution.
Key specifications for 12000539: Bore Nominal Diameter: 1.070 INCHES BOTH ENDS IN; Teeth Quantity: 46; Surface Treatment Document and Classification: MIL-STD-171,FN1.1.2.2 MIL STD SINGLE TREATMENT RESPONSE OR MIL-STD-171,FN1.1.3.2 MIL STD SINGLE TREATMENT RESPONSE OVERALL; Body Style: PLAIN, SOLID. 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.