The Cylinder Assembly,actuating,line, cataloged under National Stock Number 3040-01-256-6539, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Tld Ace Corp Div Tld Ace. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 3040-01-256-6539 |
| Primary Part Number | 1004009 |
| Item Name | Cylinder Assembly,actuating,line |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Tld Ace Corp Div Tld Ace |
| Status | ACTIVE |
| FSC Application Data | VALVE,CHECK P/N1004010 |
| Compressed Length | 4.500 INCHES NOMINAL IN |
| Design Characteristics | SINGLE ACTING SINGLE CYLINDER |
| Overall Diameter | 1.250 INCHES NOMINAL IN |
| Integral Valve Operation Method | PNEUMATIC |
| 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 |
|---|---|
| 1004009 PRIMARY | Tld Ace Corp Div Tld Ace (USA) |
NSN 3040-01-256-6539 is a Cylinder Assembly,actuating,line, manufactured by Tld Ace Corp Div Tld Ace, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-256-6539 has 1 manufacturer part number on file: 1004009 (Tld Ace Corp Div Tld Ace).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-517-7529. Verify interchangeability with system specifications before substitution.
Key specifications for 1004009: FSC Application Data: VALVE,CHECK P/N1004010; Compressed Length: 4.500 INCHES NOMINAL IN; Design Characteristics: SINGLE ACTING SINGLE CYLINDER; Overall Diameter: 1.250 INCHES NOMINAL IN. 5 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.