The Pulley,timing Belt, cataloged under National Stock Number 3020-01-199-3146, 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 Lockheed Martin Corporation Div Rms. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-199-3146 |
| Primary Part Number | 1217B2980-1 |
| Item Name | Pulley,timing Belt |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Hub Diameter | 5.250 INCHES NOMINAL IN |
| Face Type | SINGLE ROW SPROCKET TEETH |
| Bore Type | SPECIFIED |
| Face Groove/tooth Quantity | 17 |
| Keyway Width | 0.625 INCHES NOMINAL IN |
| Surface Treatment | NICKEL |
| Bore Diameter | 2.438 INCHES NOMINAL IN |
| Material | STEEL |
| Face Width | 0.924 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 |
|---|---|
| 1217B2980-1 | Lockheed Martin Corporation Div Rms (USA) |
| 120BTL17-2.4375 INCH BORE | Rexnord Holdings Inc (USA) |
| 1213E1230 FIND 70 | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 120BTL17-2.4375 INCH BORE | 5/9 Secondary reference Martin Sprocket and Gear Inc |
| TLB 1217-2.4375 IN. BORE | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
| 0461D0089 | 3/9 Design control — primary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 1213E1230 FIND 70 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 1213E1230 | D/9 Drawing number reference only Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 1217B2980-1 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 3020-01-199-3146 is a Pulley,timing Belt, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-199-3146 has 3 manufacturer part numbers on file: 1217B2980-1 (Lockheed Martin Corporation Div Rms), 120BTL17-2.4375 INCH BORE (Rexnord Holdings Inc), 1213E1230 FIND 70 (Lockheed Martin Corporation Div Rms).
2 possible matches (shared part number, not a government interchangeability claim): 3950-01-250-3894, 3020-01-353-0777. Verify interchangeability with system specifications before substitution.
Key specifications for 1217B2980-1: Hub Diameter: 5.250 INCHES NOMINAL IN; Face Type: SINGLE ROW SPROCKET TEETH; Overall Length: 2.000 INCHES NOMINAL IN; Bore Type: SPECIFIED. 9 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.