The Gear Sector,spur, cataloged under National Stock Number 3020-00-657-5573, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-657-5573 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Teeth Quantity | 36 |
| Nominal Outside Radius | 0.396 INCHES IN |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 9 |
| Style Designator | HUBLESS |
| Material Document and Classification | QQ-A-355,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STUB |
| Arc Nominal Length | 2.354 INCHES IN |
| Pitch Radius | 0.3750 INCHES NOMINAL IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Attachment Method | CLAMP TAB |
| Face Nominal Width | 0.362 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4669570 | C/1 Advisory reference — outside the item-of-supply concept The Boeing Company |
| 4669570 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-657-5573 is a Gear Sector,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-657-5573: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Teeth Quantity: 36; Nominal Outside Radius: 0.396 INCHES IN; Bore Style: PLAIN BOTH ENDS. 14 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.
NSN 3020-00-657-5573 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.