The Gear,spur, cataloged under National Stock Number 3020-01-026-1925, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 27 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-026-1925 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.375 INCHES BOTH ENDS IN |
| Backlash Designation | GRADE C |
| Teeth Quantity | 160 |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 3 THREADED AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.209 INCHES FIRST END IN |
| First Step Nominal Length | 0.110 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 12 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.6663 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 1.120 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Mounting Hole Nominal Thread Size | 0.138 INCHES AXIALLY THROUGH BODY FIRST END IN |
| End Nominal Length | 0.100 INCHES FIRST END IN |
| Nominal Outside Diameter | 1.687 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| End Nominal Diameter | 0.745 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| Bolt Hole Circle Nominal Diameter | 0.875 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.125 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 |
| Reference | Meaning |
|---|---|
| 25000000-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-01-026-1925 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5130-01-121-5026, 9920-01-598-9704. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-026-1925: Bore Nominal Diameter: 0.375 INCHES BOTH ENDS IN; Backlash Designation: GRADE C; Teeth Quantity: 160; Surface Treatment Document and Classification: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 27 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.