The Gear,helical, cataloged under National Stock Number 3020-00-369-9455, 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 Telemechanics Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-369-9455 |
| Primary Part Number | 84357 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.563 INCHES BOTH ENDS IN |
| Helix Angle | 32.7500 DEGREES |
| Teeth Quantity | 40 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 4 COUNTERBORED AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Nominal Diameter | 0.140 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Material Document and Classification | MIL-P-15035,TYPE FBI MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.1590 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 2.249 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | PLASTIC PHENOLIC AND COTTON OVERALL |
| Bolt Hole Circle Nominal Diameter | 1.125 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.500 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 |
|---|---|
| 84357 PRIMARY | Telemechanics Inc (USA) |
| 64357 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| SCB91427 | 3/2 Design control — primary reference U.S. Government activity |
| 64357 | 5/9 Secondary reference At and T Corp |
| 84357 | 5/9 Secondary reference At and T Corp |
NSN 3020-00-369-9455 is a Gear,helical, manufactured by Telemechanics Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-369-9455 has 2 manufacturer part numbers on file: 84357 (Telemechanics Inc), 64357 (Telemechanics Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4130-00-386-3206, 4720-01-281-2434. Verify interchangeability with system specifications before substitution.
Key specifications for 84357: Bore Nominal Diameter: 0.563 INCHES BOTH ENDS IN; Helix Angle: 32.7500 DEGREES; Teeth Quantity: 40; Body Style: PLAIN, SOLID. 19 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.