The Piston, cataloged under National Stock Number 3040-01-672-4409, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Piston |
| FSC / FSG | 3040 — Miscellaneous Power Transmission Equipment (FSG 30) |
| Manufacturers | Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 3040-01-672-4409 |
| Primary Part Number | 556-6985454-6BL1 |
| Item Name | Piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 556-6985454-6BL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| H642-6930-6AL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 556-6985454-6AL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 556-6985454-6A | 3/1 Design control — primary reference Naval Sea Systems Command |
| 556-6985454-6B | 5/1 Secondary reference Naval Sea Systems Command |
| H642-6930-6A | 5/1 Secondary reference U.S. Government activity |
NSN 3040-01-672-4409 is a Piston, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-672-4409 has 3 manufacturer part numbers on file: 556-6985454-6BL1 (Naval Inventory Control Point Mechanicsburg), H642-6930-6AL1 (Naval Inventory Control Point Mechanicsburg), 556-6985454-6AL1 (Naval Inventory Control Point Mechanicsburg).
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.