The Pulley,groove, cataloged under National Stock Number 3020-01-311-1063, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-311-1063 |
| Primary Part Number | 1551AS625-2 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Taper Bore Minor Diameter | 2.765 INCHES NOMINAL IN |
| Securing Method | SPLIT-TAPERED BUSHING |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 4.000 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Outside Diameter | 6.950 INCHES NOMINAL IN |
| Keying Facility Type | TAPERED KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Pitch Diameter | 6.600 INCHES NOMINAL IN |
| Groove Depth | 1.415 INCHES NOMINAL IN |
| Bore Type | TAPERED |
| Bearings | NOT INCLUDED |
| Counterbore Depth | 1.500 INCHES NOMINAL AND 0.750 INCHES NOMINAL IN |
| Groove Quantity | 5 |
| Counterbore Location | BOTH ENDS |
| Taper Bore Major Diameter | 2.875 INCHES NOMINAL IN |
| V Groove Angle in Deg | 34.0 |
| Counterbore Diameter | 4.120 INCHES NOMINAL IN |
| Distance From Center of Bore to Bottom of Keyway | 1.580 INCHES NOMINAL IN |
| Keyway Width | 0.500 INCHES NOMINAL IN |
| Counterbore Feature | INCLUDED |
| Material | IRON CAST OVERALL |
| Furnished Items | KEYING FACILITY |
| Face Width | 4.000 INCHES NOMINAL IN |
| Groove Width | 0.637 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 |
|---|---|
| 1551AS625-2 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1551AS625 | 7/1 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 3020-01-311-1063 is a Pulley,groove, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-311-1063 has 1 manufacturer part number on file: 1551AS625-2 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1551AS625-2: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Taper Bore Minor Diameter: 2.765 INCHES NOMINAL IN; Securing Method: SPLIT-TAPERED BUSHING. 29 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.