The Pulley,groove, cataloged under National Stock Number 3020-01-042-4876, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 27 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-042-4876 |
| Primary Part Number | 815481 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Distance From Center of Bore to Top of Key | 0.816 INCHES NOMINAL IN |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.562 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Key Width | 0.128 INCHES MINIMUM AND 0.131 INCHES MAXIMUM IN |
| Groove Radius | 0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Groove Shape | V |
| Outside Diameter | 4.945 INCHES MINIMUM AND 4.947 INCHES MAXIMUM IN |
| Keying Facility Type | INTEGRAL KEY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-A-225/8, ALLOY 6061, T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/11,ALLOY 6061, T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Groove Depth | 0.058 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 67 |
| V Groove Angle in Deg | 40.0 |
| Surface Treatment | ANODIZE |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 1.500 INCHES MINIMUM AND 1.502 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.750 INCHES NOMINAL IN |
| Groove Width | 0.090 INCHES MINIMUM AND 0.095 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 |
| Part Number | Manufacturer |
|---|---|
| 815481 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 3020PL1330744 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3020-01-042-4876 is a Pulley,groove, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-042-4876 has 1 manufacturer part number on file: 815481 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-642-7901. Verify interchangeability with system specifications before substitution.
Key specifications for 815481: Distance From Center of Bore to Top of Key: 0.816 INCHES NOMINAL IN; Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED. 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.