The Pulley,groove, cataloged under National Stock Number 3020-00-971-5791, 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 25 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-971-5791 |
| Primary Part Number | 164724 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.500 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.718 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Radius | 0.078 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Groove Depth | 0.125 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | NICKEL |
| Distance From Outside Flange/rim to Hub End and Location | 0.437 INCHES NOMINAL BOTH ENDS IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.312 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 0.281 INCHES NOMINAL IN |
| Groove Width | 0.157 INCHES NOMINAL IN |
| Lightening Hole | NOT INCLUDED |
| 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 |
|---|---|
| 164724 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 164724 | C/1 Advisory reference — outside the item-of-supply concept American Telephone and Telegraph Co |
| 164724 | 5/9 Secondary reference At and T Corp |
NSN 3020-00-971-5791 is a Pulley,groove, manufactured by Telemechanics Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-971-5791 has 1 manufacturer part number on file: 164724 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 6105-01-137-1880. Verify interchangeability with system specifications before substitution.
Key specifications for 164724: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.500 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED. 25 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.