The Head,linear Actuating Cylinder, cataloged under National Stock Number 3040-01-190-2558, 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2 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-190-2558 |
| Item Name | Head,linear Actuating Cylinder |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Overall Thickness | 4.375 INCHES MAXIMUM IN |
| Material | STEEL |
| 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 |
|---|---|
| 2640-630X2 | D/9 Drawing number reference only U.S. Government activity |
| 2640-630X2 PIECE 3 | 3/2 Design control — primary reference U.S. Government activity |
| 2640-630X2- PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| SS845-2109872 | D/9 Drawing number reference only U.S. Government activity |
| SS845-2109872 PIECE 3 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-190-2558 is a Head,linear Actuating Cylinder, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3010-01-190-2559, 3040-01-190-5927, 3040-01-190-5928. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-190-2558: Overall Thickness: 4.375 INCHES MAXIMUM IN; Overall Length: 2.125 INCHES MAXIMUM IN; Overall Width: 5.000 INCHES MAXIMUM IN; Special Features: 3 PORTS 90 DEG APART,ONE PORT 0.875-14 IN.UNF 2B THD,TWO PORTS 0.312-24 IN.UNF 2B THD;4 MTG HOLES 0.640 IN.ID COUNTER BORED 1.000 IN.BY 0.625 IN.DEEP;ONE SIDE BORED 3.375 IN.ID BY 1.812 IN.DEEP IN. 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.