The Gear,internal, cataloged under National Stock Number 3020-00-374-1029, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-374-1029 |
| Primary Part Number | 6939 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — No Item Name Available |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Nominal Outside Diameter | 8.498 INCHES IN |
| Teeth Quantity | 42 |
| Mounting Hole Type and Quantity | 6 PLAIN AXIALLY THROUGH BODY FIRST END |
| Teeth Type | SPUR |
| Tooth Form | STANDARD |
| Material | IRON CAST OVERALL |
| Body Style | PLAIN, SOLID |
| Pressure Angle | 20.0000 DEGREES |
| Bolt Hole Circle Nominal Diameter | 0.875 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Pitch Diameter | 7.0000 INCHES NOMINAL IN |
| Mounting Hole Nominal Diameter | 0.328 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Nominal Overall Length | 0.625 INCHES IN |
| Style Designator | PLAIN RING |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 29358 | Davey Compressor Co Div of Keco Industries Inc (USA) |
| 30859 | Drs Environmental Systems Inc (USA) |
| 30859 | Davey Compressor Co Div of Keco Industries Inc (USA) |
| 6939 PRIMARY | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
| X2113 | Blaw Knox Corp Blaw-Knox Equipment Div (USA) |
| 29358 | Drs Environmental Systems Inc (USA) |
| 30859 | Hdt Expeditionary Systems Inc (USA) |
| 29358 | Hdt Expeditionary Systems Inc (USA) |
NSN 3020-00-374-1029 is a Gear,internal, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 3020 (No Item Name Available). Status: active.
NSN 3020-00-374-1029 has 8 cross-referenced part numbers: 29358 (Davey Compressor Co Div of Keco Industries Inc), 30859 (Drs Environmental Systems Inc), 30859 (Davey Compressor Co Div of Keco Industries Inc), 6939 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), X2113 (Blaw Knox Corp Blaw-Knox Equipment Div) and 3 more.
There are 12 known substitutes for 3020-00-374-1029: 6510-00-116-1311, 2910-00-185-7635, 5133-00-228-1332 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 6939: Nominal Outside Diameter: 8.498 INCHES IN; Teeth Quantity: 42; Special Features: MTG HOLES 60 DEG APART; Mounting Hole Type and Quantity: 6 PLAIN AXIALLY THROUGH BODY FIRST END. 15 total characteristics are documented in the Federal Logistics Information System.