The Gear,helical, cataloged under National Stock Number 3020-00-671-9229, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-671-9229 |
| Primary Part Number | 156985 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.373 INCHES BOTH ENDS IN |
| Teeth Quantity | 42 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 3 COUNTERBORED AXIALLY THROUGH BODY FIRST END |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Pitch Diameter | 1.3550 INCHES NOMINAL IN |
| Nominal Outside Diameter | 1.493 INCHES IN |
| Material | PLASTIC PHENOLIC OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.373 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 |
|---|---|
| 156985 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 156985 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 3020-00-671-9229 is a Gear,helical, manufactured by Telemechanics Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-671-9229 has 1 manufacturer part number on file: 156985 (Telemechanics Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5306-01-155-9465, 5985-01-626-3393. Verify interchangeability with system specifications before substitution.
Key specifications for 156985: Bore Nominal Diameter: 0.373 INCHES BOTH ENDS IN; Teeth Quantity: 42; Body Style: PLAIN, SOLID; Tooth Direction: LEFT. 13 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.