The Gear,bevel, cataloged under National Stock Number 3020-01-284-3537, 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 24 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 | 3020-01-284-3537 |
| Primary Part Number | 157D3509 |
| 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 | 0.622 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.999 INCHES SECOND END IN |
| Teeth Quantity | 32 |
| Body Style | WEBBED, SOLID |
| Counterbore Nominal Diameter | 0.790 INCHES FIRST END IN |
| Pitch Angle | 67.0000 DEGREES |
| Bore Style | W/COUNTERBORE FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.790 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 6 |
| Teeth Type | STRAIGHT |
| Hardness Rating | 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.130 INCHES IN |
| Style Designator | SIDE FACE, BACK HUB PROTRUDING |
| Material Document and Classification | ASTMA322 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA331 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.6667 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 23 SECOND END |
| Nominal Outside Diameter | 2.705 INCHES IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4130 OR STEEL COMP 4140 OVERALL |
| Counterbore Nominal Depth | 0.410 INCHES FIRST END IN |
| Spline Pitch Diameter | 0.7188 INCHES NOMINAL SECOND END IN |
| Face Nominal Width | 0.430 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 |
|---|---|
| 157D3509 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
NSN 3020-01-284-3537 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 3020-01-284-3537 has 1 manufacturer part number on file: 157D3509 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 157D3509: Bore Nominal Diameter: 0.622 INCHES SECOND END IN; Hub Nominal Diameter: 0.999 INCHES SECOND END IN; Teeth Quantity: 32; Body Style: WEBBED, SOLID. 24 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 3020-01-284-3537 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.