The Disk,valve, cataloged under National Stock Number 1660-00-678-0728, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-00-678-0728 |
| Item Name | Disk,valve |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Outside Diameter | 0.938 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Departure From Cited Designator | AGAGUC,AGXZ |
| Nondefinitive Spec/std Data | 1 TYPE |
| Inside Diameter | 0.095 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Media for Which Designed | AIR |
| Material | RUBBER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| A5-2-1004 | 3/2 Design control — primary reference U.S. Government activity |
| MILD50082 | 4/1 Identification reference U.S. Government activity |
NSN 1660-00-678-0728 is a Disk,valve, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1660-00-678-0729. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-00-678-0728: Overall Height: 0.007 INCHES MINIMUM AND 0.010 INCHES MAXIMUM IN; Outside Diameter: 0.938 INCHES NOMINAL IN; Style Designator: PLAIN; Departure From Cited Designator: AGAGUC,AGXZ. 7 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.
NSN 1660-00-678-0728 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.