The Pulley,flat, cataloged under National Stock Number 3020-01-442-7278, 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 Am General Llc. Government technical data includes 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-442-7278 |
| Primary Part Number | RCSK18221 |
| Item Name | Pulley,flat |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Am General Llc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 4.470 INCHES NOMINAL AND 4.560 INCHES MAXIMUM AA END IN |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.045 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| First Step Face Largest Diameter and Location | 4.560 INCHES NOMINAL AA END IN |
| Second Step Face Largest Diameter and Location | 1.998 INCHES NOMINAL AA END IN |
| Outside Diameter | 12.860 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Rim Type | SOLID |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Protruding Hub Characteristic | STEPPED |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.640 INCHES NOMINAL AA END IN |
| Keying Facility | NOT INCLUDED |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.748 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Material | IRON CAST OVERALL |
| Crown Face | NOT INCLUDED |
| Face Width | 1.160 INCHES NOMINAL 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 |
|---|---|
| RCSK18221 PRIMARY | Am General Llc (USA) |
| 12460249 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 3020014427278 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 3020PL0705098 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3020-01-442-7278 is a Pulley,flat, manufactured by Am General Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-442-7278 has 2 manufacturer part numbers on file: RCSK18221 (Am General Llc), 12460249 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for RCSK18221: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 4.470 INCHES NOMINAL AND 4.560 INCHES MAXIMUM AA END IN; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED. 24 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.