The Gear,spur, cataloged under National Stock Number 3020-01-170-5408, 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 Southern Gear & Machine Inc. Government technical data includes 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-170-5408 |
| Primary Part Number | ML651-260SHS/1250 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Southern Gear & Machine Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.187 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.435 INCHES FIRST END IN |
| Teeth Quantity | 260 |
| Clamping Surface Nominal Length | 0.156 INCHES FIRST END IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE HUB |
| Surface Treatment Document and Classification | MIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.219 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE HUB |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Pitch Diameter | 2.1656 INCHES MINIMUM AND 2.1666 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | SPLIT FIRST END |
| Nominal Outside Diameter | 2.182 INCHES IN |
| Surface Treatment | PASSIVATE HUB |
| Surface Treatment | ANODIZE BODY |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 2024 BODY |
| Material | STEEL COMP 303 HUB |
| Attachment Method | CLAMP |
| Face Nominal Width | 0.062 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 |
|---|---|
| ML651-260SHS/1250 PRIMARY | Southern Gear & Machine Inc (USA) |
| Reference | Meaning |
|---|---|
| 419422 | 7/1 Vendor item drawing reference U.S. Government activity |
| 419422-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-170-5408 is a Gear,spur, manufactured by Southern Gear & Machine Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-170-5408 has 1 manufacturer part number on file: ML651-260SHS/1250 (Southern Gear & Machine Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4710-01-202-6617, 5330-01-643-1754. Verify interchangeability with system specifications before substitution.
Key specifications for ML651-260SHS/1250: Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.435 INCHES FIRST END IN; Teeth Quantity: 260; Clamping Surface Nominal Length: 0.156 INCHES FIRST END IN. 24 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.