The Pulley,groove, cataloged under National Stock Number 3020-00-528-0503, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 27 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-528-0503 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.375 INCHES MINIMUM AND 0.425 INCHES MAXIMUM BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.432 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Design Form | PLAIN |
| Groove Radius | 0.047 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Groove Shape | U |
| Outside Diameter | 2.620 INCHES MINIMUM AND 2.630 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Groove Depth | 0.156 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Bearing Type | BALL |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| Surface Treatment | CADMIUM |
| Distance From Outside Flange/rim to Hub End and Location | 0.071 INCHES MINIMUM BOTH ENDS AND 0.074 INCHES MAXIMUM BOTH ENDS IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.2495 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 0.270 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Groove Width | 0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM 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 |
|---|---|
| NAS376 | 3/1 Design control — primary reference U.S. Government activity |
| NAS376-4FP | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-528-0503 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-528-0503: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.375 INCHES MINIMUM AND 0.425 INCHES MAXIMUM BOTH ENDS IN; Bore Feature: INCLUDED; Bearing Quantity: 1. 27 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.