The Speedometer, cataloged under National Stock Number 6680-01-160-8581, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Stewart-Warner Corporation. Government technical data includes 10 specifications, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-160-8581 |
| Primary Part Number | 550SZ |
| Item Name | Speedometer |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Stewart-Warner Corporation |
| Status | ACTIVE |
| Head Type | MECHANICAL |
| Case Overall Diameter | 3.375 INCHES NOMINAL IN |
| Odometer Total Range | +0.0 TO 99999.9 MILES |
| Thread Direction | RIGHT-HAND |
| Speed Indicator Range | +0.0 TO 90.0 MILES PER HOUR |
| Size | 0.105 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN |
| Thread Size | 5/8-18 |
| Screw Thread Series Designator | UNF |
| Luminous Major Graduations/indicator | NOT PROVIDED |
| Shaft Opening Design | SQUARE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 550SZ PRIMARY | Stewart-Warner Corporation (USA) |
| Reference | Meaning |
|---|---|
| 550 | 3/1 Design control — primary reference Stewart-Warner Corporation |
| 53104756 | 5/2 Secondary reference U.S. Government activity |
| 25022675 | 5/9 Secondary reference General Motors Llc Dba General Motors |
| 550-JS | 5/9 Secondary reference Stewart-Warner Corporation |
NSN 6680-01-160-8581 is a Speedometer, manufactured by Stewart-Warner Corporation, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-160-8581 has 1 manufacturer part number on file: 550SZ (Stewart-Warner Corporation).
Key specifications for 550SZ: Head Type: MECHANICAL; Case Overall Diameter: 3.375 INCHES NOMINAL IN; Odometer Total Range: +0.0 TO 99999.9 MILES; Thread Direction: RIGHT-HAND. 10 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.