The Gear,spur, cataloged under National Stock Number 3020-00-153-7148, 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 Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-153-7148 |
| Primary Part Number | X206799D |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.508 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 4.750 INCHES FIRST END IN |
| Teeth Quantity | 48 |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 8 THREADED AXIALLY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.114 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Pitch Diameter | 6.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Features Provided | CASEHARDENED |
| Hub Style Designator | PLAIN FIRST END |
| Mounting Hole Nominal Thread Size | 0.312 INCHES AXIALLY THROUGH HUB FIRST END IN |
| Nominal Outside Diameter | 6.250 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Mounting Hole Thread Series Designator | UNF AXIALLY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 0.108 INCHES SECOND END IN |
| Face Nominal Width | 0.800 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 |
|---|---|
| X206799D PRIMARY | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
| Reference | Meaning |
|---|---|
| X206799 | 5/9 Secondary reference Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| 3222680R1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-153-7148 is a Gear,spur, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-153-7148 has 1 manufacturer part number on file: X206799D (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).
Key specifications for X206799D: Bore Nominal Diameter: 3.508 INCHES BOTH ENDS IN; Hub Nominal Diameter: 4.750 INCHES FIRST END IN; Teeth Quantity: 48; Body Style: WEBBED, OFFSET, SOLID. 20 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.