The Gear,helical, cataloged under National Stock Number 3020-00-705-5003, 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 21 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-705-5003 |
| Primary Part Number | 159285 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.5000 INCHES BOTH ENDS IN |
| Helix Angle | 20.0000 DEGREES |
| Teeth Quantity | 84 |
| Body Style | SPOKED, OFFSET |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 2 PLAIN AXIALLY THROUGH HUB FIRST END |
| Mounting Hole Nominal Diameter | 0.162 INCHES AXIALLY THROUGH HUB FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS, RECESSED BODY |
| Pitch Diameter | 3.2307 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 3.3077 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | PLASTIC POLYAMIDE NYLON BODY |
| Material | STEEL HUB |
| Bolt Hole Circle Nominal Diameter | 0.750 INCHES AXIALLY THROUGH HUB FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 0.031 INCHES FIRST END IN |
| Body Recess Nominal Depth | 0.156 INCHES SECOND END IN |
| Face Nominal Width | 0.312 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 |
|---|---|
| 159285 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 7902037-17 | 5/2 Secondary reference U.S. Government activity |
| 159285 | C/1 Advisory reference — outside the item-of-supply concept American Telephone and Telegraph Co |
| 159285 | 5/9 Secondary reference At and T Corp |
| 15908 | C/1 Advisory reference — outside the item-of-supply concept At and T Corp |
| 3020PL1339003 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3020-00-705-5003 is a Gear,helical, manufactured by Telemechanics Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-705-5003 has 1 manufacturer part number on file: 159285 (Telemechanics Inc).
4 possible matches (shared part number, not a government interchangeability claim): 1630-00-821-4678, 5133-01-399-0748, 8145-01-562-2410. Verify interchangeability with system specifications before substitution.
Key specifications for 159285: Bore Nominal Diameter: 0.5000 INCHES BOTH ENDS IN; Helix Angle: 20.0000 DEGREES; Teeth Quantity: 84; Body Style: SPOKED, OFFSET. 21 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 3020-00-705-5003 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.