The Pulley,groove, cataloged under National Stock Number 3020-00-933-7929, 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 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 30 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-933-7929 |
| Primary Part Number | 4A12-0QD |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 4.500 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Securing Method | DRILLED HOLE |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.250 INCHES NOMINAL IN |
| Design Form | SPOKED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Shape | V |
| Outside Diameter | 12.750 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 12.000 INCHES MINIMUM AND 12.250 INCHES MAXIMUM IN |
| Groove Depth | 0.625 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 4 |
| V Groove Angle in Deg | 34.0 |
| Protruding Hub Characteristic | PLAIN |
| Securing Hole Quantity | 3 |
| Bolt Circle Diameter | 3.375 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.375 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 1.000 INCHES NOMINAL BOTH ENDS IN |
| Hole Location | THRU HUB EQUALLY SPACED |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 2.812 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 3.250 INCHES NOMINAL IN |
| Groove Width | 0.625 INCHES NOMINAL 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 |
|---|---|
| 4A12-0QD | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 12-0PD4AQD1 1-8B0RE | Eaton Corp Industrial Drives Opns Distributor Products Div (USA) |
| Reference | Meaning |
|---|---|
| 6-1-1936-33-46A | 5/9 Secondary reference Eidal International Corporation |
| 6-1-1936-33-46 | 3/2 Design control — primary reference U.S. Government activity |
| 4A12-0QD | 5/9 Secondary reference U.S. Government activity |
| 4A12-0QD | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 3020-00-933-7929 is a Pulley,groove, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-933-7929 has 2 manufacturer part numbers on file: 4A12-0QD (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 12-0PD4AQD1 1-8B0RE (Eaton Corp Industrial Drives Opns Distributor Products Div).
Key specifications for 4A12-0QD: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 4.500 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Securing Method: DRILLED HOLE. 30 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.