The Gear,spur, cataloged under National Stock Number 3020-00-155-9188, 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 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-155-9188 |
| Primary Part Number | 117D2476 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Hub Nominal Diameter | 1.020 INCHES FIRST END IN |
| Nominal Distance From Flat to Radial Center | 0.206 INCHES BOTH ENDS IN |
| Teeth Quantity | 36 |
| Body Style | PLAIN, SOLID |
| Bore Style | D BOTH ENDS |
| Mounting Hole Type and Quantity | 2 PLAIN TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.570 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 8 |
| Mounting Hole Nominal Diameter | 0.190 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | FEAT |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-624 COMP 4140 OR 41L40 CONDITION COLD FINISH FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 3.156 INCHES IN |
| Nominal Radius | 0.312 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.320 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 117D2476 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| 117D2476 | 5/9 Secondary reference National Gear Products Inc |
| 1702476 | 5/9 Secondary reference National Gear Products Inc |
NSN 3020-00-155-9188 is a Gear,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 3020-00-155-9188 has 1 manufacturer part number on file: 117D2476 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 117D2476: Hub Nominal Diameter: 1.020 INCHES FIRST END IN; Nominal Distance From Flat to Radial Center: 0.206 INCHES BOTH ENDS IN; Teeth Quantity: 36; Body Style: PLAIN, SOLID. 22 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.