The Roller,levelwind,windlass, cataloged under National Stock Number 3950-01-424-6846, is classified within Federal Supply Class 3950 (Winches, Hoists, Cranes, and Derricks) of the Materials Handling Equipment group. The manufacturer of record is Appleton Marine Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3950-01-424-6846 |
| Primary Part Number | MMD-2221 |
| Item Name | Roller,levelwind,windlass |
| FSC / FSG | 3950 / 39 — Winches, Hoists, Cranes, and Derricks |
| Manufacturer | Appleton Marine Inc |
| Status | ACTIVE |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| General Characteristics Item Description | 3.000 IN. ID IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| MMD-2221 PRIMARY | Appleton Marine Inc (USA) |
| AMD-1088 ITEM 30 | Appleton Marine Inc (USA) |
| Reference | Meaning |
|---|---|
| AMD-1088 | 5/1 Secondary reference Appleton Marine Inc |
NSN 3950-01-424-6846 is a Roller,levelwind,windlass, manufactured by Appleton Marine Inc, classified under FSC 3950, Winches, Hoists, Cranes, and Derricks. Status: active.
NSN 3950-01-424-6846 has 2 manufacturer part numbers on file: MMD-2221 (Appleton Marine Inc), AMD-1088 ITEM 30 (Appleton Marine Inc).
4 possible matches (shared part number, not a government interchangeability claim): 3040-01-425-6611, 3040-01-425-6614, 3040-01-425-6615. Verify interchangeability with system specifications before substitution.
Key specifications for MMD-2221: Overall Diameter: 4.000 INCHES NOMINAL IN; General Characteristics Item Description: 3.000 IN. ID IN; Overall Length: 12.440 INCHES NOMINAL IN; Special Features: USED ON APPLETON MARINE AMD-1088 WINCH/WINDLASS ASSEMBLY. 3 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.