The Gear Sector,spur, cataloged under National Stock Number 3020-00-528-1370, 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 General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-528-1370 |
| Primary Part Number | 117D2974 |
| Item Name | Gear Sector,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Teeth Quantity | 27 |
| Nominal Outside Radius | 5.514 INCHES IN |
| Mounting Hole Type and Quantity | 3 PLAIN AND 2 PLAIN AXIALLY THROUGH BODY FIRST END |
| Precision Classification | QUALITY NUMBER 10 |
| Mounting Hole Nominal Diameter | 0.285 INCHES AND 0.030 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS, RECESSED BODY |
| Material Document and Classification | QQ-S-626,COMP 8620 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-624,COND NORMALIZED FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Tooth Form | STANDARD |
| Arc Nominal Length | 8.650 INCHES IN |
| Pitch Radius | 5.4500 INCHES NOMINAL IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 3.912 INCHES AND 4.125 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 0.505 INCHES FIRST END IN |
| Face Nominal Width | 0.760 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 |
| Part Number | Manufacturer |
|---|---|
| 117D2974 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| 117D2974 | 5/9 Secondary reference Astro Gear and Instrument Co Inc |
NSN 3020-00-528-1370 is a Gear Sector,spur, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-528-1370 has 1 manufacturer part number on file: 117D2974 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 117D2974: Teeth Quantity: 27; Nominal Outside Radius: 5.514 INCHES IN; Mounting Hole Type and Quantity: 3 PLAIN AND 2 PLAIN AXIALLY THROUGH BODY FIRST END; Precision Classification: QUALITY NUMBER 10. 17 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 3020-00-528-1370 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.