The Piston,valve, cataloged under National Stock Number 1660-01-055-3400, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-055-3400 |
| Primary Part Number | 2763298-101 |
| Item Name | Piston,valve |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics |
| Status | ACTIVE |
| General Characteristics Item Description | CRES 17-4PH AMS5643,PASSIVATE PER QQ-P-35 TYPE I,II OR III,HEAT TREAT TO COND H1025 PER MIL-H-6875,3.750 IN. LG,LARGE END 0.924 IN. MAX 0.922 IN. MIN DIA IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2763298-101 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics (USA) |
| Reference | Meaning |
|---|---|
| 2763298-101 | 5/9 Secondary reference U.S. Government activity |
| 2763298-101 | 5/1 Secondary reference Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations |
NSN 1660-01-055-3400 is a Piston,valve, manufactured by Parker-Hannifin Corporation Dba Pneutronics, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-055-3400 has 1 manufacturer part number on file: 2763298-101 (Parker-Hannifin Corporation Dba Pneutronics).
Key specifications for 2763298-101: General Characteristics Item Description: CRES 17-4PH AMS5643,PASSIVATE PER QQ-P-35 TYPE I,II OR III,HEAT TREAT TO COND H1025 PER MIL-H-6875,3.750 IN. LG,LARGE END 0.924 IN. MAX 0.922 IN. MIN DIA IN; End Item Identification: VALVE PN2750023-101 ACFT F16A/B. 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 1660-01-055-3400 has DEMIL Code Q. 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.