The Gear,bevel, cataloged under National Stock Number 3020-00-172-6744, 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 28 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-172-6744 |
| Primary Part Number | 139C6697 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.600 INCHES FIRST END IN |
| Bore Nominal Diameter | 0.525 INCHES SECOND END IN |
| Teeth Quantity | 26 |
| Surface Treatment Document and Classification | MIL-STD-171,5.3.1.2 MIL STD 1ST TREATMENT RESPONSE OR MIL-STD-171,5.3.2.2 MIL STD 2ND TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 31.1600 DEGREES |
| Bore Style | INVOLUTE SPLINE SECOND END |
| Bore Style | PARTIAL FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.934 INCHES SECOND END IN |
| First Step Nominal Length | 0.212 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 9 |
| Teeth Type | STRAIGHT |
| Nominal Overall Length | 2.323 INCHES IN |
| Style Designator | PERIPHERAL FACE, BACK HUB PROTRUDING |
| Bore Nominal Depth | 1.323 INCHES FIRST END IN |
| Material Document and Classification | MIL-S-46850,TYPE 3,GRADE 300,COND 1A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL A |
| Pitch Diameter | 1.6250 INCHES NOMINAL IN |
| First Step Nominal Diameter | 1.380 INCHES SECOND END IN |
| Hub Style Designator | 1 STEP SECOND END |
| Spline Quantity | 15 SECOND END |
| End Nominal Length | 1.510 INCHES SECOND END IN |
| Nominal Outside Diameter | 1.763 INCHES IN |
| Surface Treatment | PHOSPHATE MANGANESE OR PHOSPHATE ZINC OVERALL |
| End Nominal Diameter | 1.180 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL UNS K93160 OVERALL |
| Spline Pitch Diameter | 0.4688 INCHES NOMINAL SECOND END IN |
| Face Nominal Width | 0.389 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 |
|---|---|
| 139C6697 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
NSN 3020-00-172-6744 is a Gear,bevel, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-172-6744 has 1 manufacturer part number on file: 139C6697 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 139C6697: Bore Nominal Diameter: 0.600 INCHES FIRST END IN; Bore Nominal Diameter: 0.525 INCHES SECOND END IN; Teeth Quantity: 26; Surface Treatment Document and Classification: MIL-STD-171,5.3.1.2 MIL STD 1ST TREATMENT RESPONSE OR MIL-STD-171,5.3.2.2 MIL STD 2ND TREATMENT RESPONSE OVERALL. 28 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.