The Grille,metal, cataloged under National Stock Number 1660-01-339-9431, 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 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-339-9431 |
| Item Name | Grille,metal |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Mounting Hole Quantity | 8 |
| Frame Opening Diameter | 5.500 INCHES NOMINAL IN |
| Mounting Hole Diameter | 0.218 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN |
| Shape | ROUND |
| Perforation Shape | SQUARE |
| Frame Overall Width | 0.300 INCHES NOMINAL IN |
| Frame Type | ROUND |
| Frame Overall Diameter | 7.500 INCHES NOMINAL IN |
| Core Type | PERFORATED METAL |
| 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 |
|---|---|
| DAA3119D306-001 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-01-339-9431 is a Grille,metal, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-01-339-9431: Mounting Hole Quantity: 8; Frame Opening Diameter: 5.500 INCHES NOMINAL IN; Mounting Hole Diameter: 0.218 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN; Shape: ROUND. 9 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 1660-01-339-9431 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.