The Pulley,groove, cataloged under National Stock Number 3020-00-554-7439, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-554-7439 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 1.300 INCHES MINIMUM AND 1.310 INCHES MAXIMUM BB END IN |
| Hub Outside Diameter | 1.380 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.620 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Radius | 0.052 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Groove Shape | U |
| Outside Diameter | 6.000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material Document and Classification | MIL-P-15035, TYPE FBM MIL SPEC SINGLE MATERIAL RESPONSE AND WW-T-791, GRADE 1, TYPE A FED SPEC SINGLE MATERIAL RESPONSE HUB |
| Groove Depth | 0.139 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Bearing Type | BALL |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE AND UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.125 INCHES NOMINAL BOTH ENDS IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.2495 INCHES NOMINAL IN |
| Material | COPPER ALLOY 230 LOCATION NOT OTHERWISE SPECIFIED |
| Material | PLASTIC PHENOLIC AND COTTON HUB |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 0.250 INCHES NOMINAL IN |
| Groove Width | 0.120 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 |
| Reference | Meaning |
|---|---|
| 346863 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-554-7439 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3020-01-391-3904. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-554-7439: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 1.300 INCHES MINIMUM AND 1.310 INCHES MAXIMUM BB END IN; Hub Outside Diameter: 1.380 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED. 28 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.