The Piston,linear Actuating Cylinder, cataloged under National Stock Number 3040-01-144-9670, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-144-9670 |
| Item Name | Piston,linear Actuating Cylinder |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Outside Diameter | 3.125 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SSN637-501-2143844 | D/9 Drawing number reference only U.S. Government activity |
| SSN637-501-2143844 PIECE 8 | 5/2 Secondary reference U.S. Government activity |
| 77643-65X4 | D/9 Drawing number reference only U.S. Government activity |
| 77643-65X4 PIECE 8 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-144-9670 is a Piston,linear Actuating Cylinder, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-144-9678, 4710-01-145-5253. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-144-9670: Outside Diameter: 3.125 INCHES NOMINAL IN; Special Features: BRONZE MANGANESE PER MIL-B-11553,COMP 5; Material: COPPER ALLOY. 2 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.