The Pulley,groove, cataloged under National Stock Number 3020-01-441-5136, 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 In Mar Systems Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-441-5136 |
| Primary Part Number | IM-0426-452 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | In Mar Systems Inc |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| IM-0426-452 PRIMARY | In Mar Systems Inc (USA) |
| IM-1642-S18-B25-A24- PC6 | In Mar Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| IM-1642-(S18-B25-A24) | D/9 Drawing number reference only In Mar Systems Inc |
NSN 3020-01-441-5136 is a Pulley,groove, manufactured by In Mar Systems Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-441-5136 has 2 manufacturer part numbers on file: IM-0426-452 (In Mar Systems Inc), IM-1642-S18-B25-A24- PC6 (In Mar Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-450-6713. Verify interchangeability with system specifications before substitution.
Key specifications for IM-0426-452: Special Features: USED ON WYNN TYPE D STRAIGHT-LINE SINGLE BLADED WIPER FOR LCAC PROJECT, WEAPONS SYSTEM STRATEGIC SEALIFT CONVERSION SHIPS CLASS; End Item Identification: 2090-01-438-0123; Material: STEEL CORROSION RESISTING OVERALL. 1 specification is 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.