The Gear,spur, cataloged under National Stock Number 3020-00-705-4931, 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 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-705-4931 |
| Primary Part Number | 156958 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.373 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.373 INCHES BOTH ENDS IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.168 INCHES BOTH ENDS IN |
| Teeth Quantity | 21 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 3 PLAIN AXIALLY THROUGH BODY SECOND END |
| Mounting Hole Nominal Diameter | 0.147 INCHES AXIALLY THROUGH BODY SECOND END IN |
| Style Designator | RECESSED HUBS |
| Pitch Diameter | 1.4188 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 1.554 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.561 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 |
|---|---|
| 156958 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 156958 | C/1 Advisory reference — outside the item-of-supply concept American Telephone and Telegraph Co |
| 156958 | 5/9 Secondary reference At and T Corp |
NSN 3020-00-705-4931 is a Gear,spur, manufactured by Telemechanics Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-705-4931 has 1 manufacturer part number on file: 156958 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-250-6645. Verify interchangeability with system specifications before substitution.
Key specifications for 156958: Bore Nominal Diameter: 0.373 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.373 INCHES BOTH ENDS IN; Nominal Distance Between Body Face and Recessed Hub End: 0.168 INCHES BOTH ENDS IN; Teeth Quantity: 21. 17 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.