The Pulley,groove, cataloged under National Stock Number 3020-00-451-4603, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-451-4603 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 2.500 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.125 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Radius | 0.250 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 6.000 INCHES NOMINAL IN |
| Shaft Size for Which Designed | 1.253 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material Document and Classification | AISI 1020 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Groove Depth | 0.625 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Bearing Type | SLEEVE |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.062 INCHES NOMINAL BOTH ENDS IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 1.436 INCHES NOMINAL IN |
| Material | STEEL COMP 1020 OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Groove Width | 0.625 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 |
|---|---|
| A9510 | 3/9 Design control — primary reference Cleveland Trencher Co Inc |
NSN 3020-00-451-4603 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 2030-00-931-2456, 6532-01-153-6546. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-451-4603: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 2.500 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Bearing Quantity: 1. 26 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.