The Gear,helical, cataloged under National Stock Number 3020-01-184-9503, 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 Indal Technologies Inc. Government technical data includes 30 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-184-9503 |
| Primary Part Number | 6534D436-1 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Indal Technologies Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.125 INCHES SECOND END IN |
| Bore Nominal Diameter | 2.060 INCHES COUNTERBORE FIRST END IN |
| Helix Angle | 23.9497 DEGREES |
| Hub Nominal Diameter | 2.954 INCHES SECOND END IN |
| Teeth Quantity | 16 |
| Surface Treatment Document and Classification | MIL-C-14550 CLASS 3 MFR REF SINGLE TREATMENT RESPONSE SPLINE |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 1.682 INCHES SECOND COUNTERBORE SECOND END IN |
| Counterbore Nominal Diameter | 2.130 INCHES FIRST COUNTERBORE SECOND END IN |
| Tooth Direction | RIGHT |
| Bore Style | INVOLUTE SPLINE SECOND END |
| Bore Style | W/STEPPED COUNTERBORE COUNTERBORE FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.250 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.810 INCHES FIRST END IN |
| First Step Nominal Length | 1.010 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 31.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM TEETH |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-5000 COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.5000 INCHES NOMINAL IN |
| First Step Nominal Diameter | 2.954 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | 1 GROOVE SECOND END |
| Spline Quantity | 11 SECOND END |
| End Nominal Length | 0.620 INCHES FIRST END IN |
| Nominal Outside Diameter | 3.900 INCHES IN |
| Surface Treatment | COPPER SPLINE |
| Nominal Distance From End to First Groove | 1.070 INCHES SECOND END IN |
| End Nominal Diameter | 2.938 INCHES FIRST END 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 |
|---|---|
| 6534D436-1 PRIMARY | Indal Technologies Inc (CAN) |
| Reference | Meaning |
|---|---|
| 6534D436 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-184-9503 is a Gear,helical, manufactured by Indal Technologies Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-184-9503 has 1 manufacturer part number on file: 6534D436-1 (Indal Technologies Inc).
Key specifications for 6534D436-1: Bore Nominal Diameter: 2.125 INCHES SECOND END IN; Bore Nominal Diameter: 2.060 INCHES COUNTERBORE FIRST END IN; Helix Angle: 23.9497 DEGREES; Hub Nominal Diameter: 2.954 INCHES SECOND END IN. 30 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.