The Altimeter,pressure, cataloged under National Stock Number 6610-00-774-5656, is classified within Federal Supply Class 6610 (Flight Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6610-00-774-5656 |
| Item Name | Altimeter,pressure |
| FSC / FSG | 6610 / 66 — Flight Instruments |
| Status | ACTIVE |
| Scale Quantity | 4 |
| Scale Marking | LETTERS AND NUMERALS AND LINED INCREMENTS |
| Mechanical Connection Quantity | 1 |
| Scale Name | ALTITUDE AND BAROMETRIC PRESSURE |
| Overall Diameter | 3.250 INCHES NOMINAL IN |
| Knob Purpose | FOR SETTING BAROMETRIC SCALE |
| Mounting Method | THREADED BEZEL |
| Mechanical Connection Type | INTERNAL PIPE |
| Criticality Code Justification | AGAV |
| Scale Marking Transparency | FLUORESCENT |
| Mechanical Connection Size | 1/8 IN. IN |
| Pointer Quantity | 4 |
| Nondefinitive Spec/std Data | AAU-8/A TYPE |
| Pointer Finish | FLUORESCENT |
| Knob Quantity | 1 |
| Scale Smallest Increment Graduation | 20 FT,200 FT,2000 FT,0.020 IN. IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| A8PAAU8AA | 5/2 Secondary reference U.S. Government activity |
| 6610PL1019542 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AAU8A | 4/1 Identification reference U.S. Government activity |
| MILA27229 | 4/1 Identification reference U.S. Government activity |
| A80AAU8A | 3/2 Design control — primary reference U.S. Government activity |
NSN 6610-00-774-5656 is a Altimeter,pressure, classified under FSC 6610, Flight Instruments. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 6610-00-827-7874, 6610-00-879-2788, 6610-00-917-5599. Verify interchangeability with system specifications before substitution.
Key specifications for 6610-00-774-5656: Scale Quantity: 4; Scale Marking: LETTERS AND NUMERALS AND LINED INCREMENTS; Mechanical Connection Quantity: 1; Scale Name: ALTITUDE AND BAROMETRIC PRESSURE. 16 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6610-00-774-5656 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.