The Pulley,groove, cataloged under National Stock Number 3020-01-439-2327, 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 Lake Shore Systems, Inc.. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-439-2327 |
| Primary Part Number | 7D3-04942 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Securing Method | MOUNTED BETWEEN BRACKETS |
| Split Hub Feature | NOT INCLUDED |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Shape | U |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 27.5000 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Protruding Hub Characteristic | PLAIN |
| Bearing Type | ROLLER |
| Counterbore Feature | NOT INCLUDED |
| Material | STEEL OVERALL |
| Furnished Items and Quantity | 1 MTG BRACKET;1 TAPERED ROLLER BEARING;2 SEAL;1 LUB FITTING;1 PRESSURE RELIEF FTG;1 PIN;1 SPACER;1 KEEPER;4 SOCKETHEAD CAPSCREW W/NYLON INSERT;2 GUARD;1 HEX NUT;1 PIPE PLUG SOCKETHEAD |
| 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 |
|---|---|
| 7D3-04942 PRIMARY | Lake Shore Systems, Inc. (USA) |
| 7D5-04924 IT NO 9 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 7D5-04924 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
| 7D3-04942 REV B | C/1 Advisory reference — outside the item-of-supply concept Lake Shore Systems, Inc. |
| 7D5-04913 IT NO 9 | 5/9 Secondary reference Lake Shore Systems, Inc. |
NSN 3020-01-439-2327 is a Pulley,groove, manufactured by Lake Shore Systems, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-439-2327 has 2 manufacturer part numbers on file: 7D3-04942 (Lake Shore Systems, Inc.), 7D5-04924 IT NO 9 (Lake Shore Systems, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-440-4942, 3020-01-440-5436. Verify interchangeability with system specifications before substitution.
Key specifications for 7D3-04942: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Bearing Quantity: 1; Securing Method: MOUNTED BETWEEN BRACKETS. 19 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.