The Indicator,air Speed, cataloged under National Stock Number 6610-01-552-7651, is classified within Federal Supply Class 6610 (Flight Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6610-01-552-7651 |
| Item Name | Indicator,air Speed |
| FSC / FSG | 6610 / 66 — Flight Instruments |
| Status | ACTIVE |
| Individual Marking | LINES INDICATING 5 AND 10 KNOT INCREMENTS; NUMBERS INDICATING 20 KNOT INCREMENTS |
| Mounting Facility Type and Quantity | 1 PANEL |
| Length | 4.400 INCHES MAXIMUM4.400 INCHES MAXIMUM IN |
| Current Type | DC |
| Mechanical Connection Quantity | 2 |
| Usage Design | AIR SPEED |
| Electrical Connection Quantity | 1 |
| Electrical Connection Identifying Number | MS27471Y-9-N-98P OR EQUIVALENT |
| Mechanical Connection Type | TUBE W/FITTINGS |
| Diameter | 2.265 INCHES NOMINAL2.265 INCHES NOMINAL IN |
| Mechanical Connection Size | STATIC PORT .5625-18 UNJF-3B; PITOT PORT .4375-20 UNJF-3B |
| Contact Quantity | 3 |
| Pointer Type | INDICATING SINGLE POINTER |
| Presentation Type | DIAL |
| Scale Division Quantity | 37 SINGLE INDICATOR SINGLE SCALE |
| Width | 2.360 INCHES MINIMUM AND 2.360 INCHES MINIMUM AND 2.390 INCHES MAXIMUM2.390 INCHES MAXIMUM IN |
| Test Data Document | CBHT-299-947-526 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Pointer Purpose | INDICATE FORWARD VELOCITY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 25020-8168 | 5/9 Secondary reference U.S. Government activity |
| 25020-8176 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6610-01-552-7651 is a Indicator,air Speed, classified under FSC 6610, Flight Instruments. Status: active.
Key specifications for 6610-01-552-7651: Individual Marking: LINES INDICATING 5 AND 10 KNOT INCREMENTS; NUMBERS INDICATING 20 KNOT INCREMENTS; Mounting Facility Type and Quantity: 1 PANEL; Length: 4.400 INCHES MAXIMUM4.400 INCHES MAXIMUM IN; Current Type: DC. 18 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.
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.