The Piston,hold Down Valve, cataloged under National Stock Number 1650-00-394-4073, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Mid-America Aerotech, Llc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1650-00-394-4073 |
| Primary Part Number | 34513 |
| Item Name | Piston,hold Down Valve |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Mid-America Aerotech, Llc |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,QQ-A-225/6,COMP 2024,TEMPER T4,1.700 IN.O/A LG,0.500 IN. OD IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 34513 PRIMARY | Mid-America Aerotech, Llc (USA) |
| Reference | Meaning |
|---|---|
| 34513 | 5/9 Secondary reference E-Systems Inc Montek Div Fluid Controls Opns |
| 34513 | 5/9 Secondary reference Moog Inc Div Moog Inc., Space and Defense - Salt Lake City |
| 34513 | 5/9 Secondary reference U.S. Government activity |
NSN 1650-00-394-4073 is a Piston,hold Down Valve, manufactured by Mid-America Aerotech, Llc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-394-4073 has 1 manufacturer part number on file: 34513 (Mid-America Aerotech, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-398-1671. Verify interchangeability with system specifications before substitution.
Key specifications for 34513: General Characteristics Item Description: ALUMINUM ALLOY,QQ-A-225/6,COMP 2024,TEMPER T4,1.700 IN.O/A LG,0.500 IN. OD IN; End Item Identification: AIRCRAFT MODEL S-3A A. 1 specification is 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.
NSN 1650-00-394-4073 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.