The Pulley,groove, cataloged under National Stock Number 3020-01-462-8255, 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 Northrop Grumman Systems Corporation. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-462-8255 |
| Primary Part Number | 20557025 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 30.0 MILLIMETERS NOMINAL MM |
| Design Form | PLAIN |
| Groove Shape | V |
| Outside Diameter | 63.5 MILLIMETERS NOMINAL MM |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Material Document and Classification | ASTM A48, CLASS 30 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 58.0 MILLIMETERS NOMINAL MM |
| Groove Depth | 6.3 MILLIMETERS NOMINAL MM |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 34.0 |
| Distance From Center of Bore to Bottom of Keyway | 11.1 MILLIMETERS NOMINAL MM |
| Keyway Width | 5.0 MILLIMETERS NOMINAL MM |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 13.0 MILLIMETERS NOMINAL AA END MM |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 10.47 MILLIMETERS NOMINAL MM |
| Material | IRON CAST UNS F12101 OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Furnished Items | KEYING FACILITY |
| Face Width | 17.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 20557025 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 3020-01-462-8255 is a Pulley,groove, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-462-8255 has 1 manufacturer part number on file: 20557025 (Northrop Grumman Systems Corporation).
Key specifications for 20557025: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED; Bore Length: 30.0 MILLIMETERS NOMINAL MM. 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.