The Control Unit,speed, cataloged under National Stock Number 2990-01-239-5316, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Ambac International Corporation Div Ambac International. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-239-5316 |
| Primary Part Number | CW673C-30U |
| Item Name | Control Unit,speed |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Ambac International Corporation Div Ambac International |
| Status | ACTIVE |
| General Characteristics Item Description | BODY DIA 4.562 IN.,O/A LG 5.812 IN.,HEIGHT 8.375 IN.,WIDTH 2.750 IN.,5.000 IN. BETWEEN MOUNTING HOLES,AND 4 HOLES 0.281 DIA. IN |
| 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 |
|---|---|
| CW673C-30U PRIMARY | Ambac International Corporation Div Ambac International (USA) |
| Reference | Meaning |
|---|---|
| CU673C-23 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
NSN 2990-01-239-5316 is a Control Unit,speed, manufactured by Ambac International Corporation Div Ambac International, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-239-5316 has 1 manufacturer part number on file: CW673C-30U (Ambac International Corporation Div Ambac International).
Key specifications for CW673C-30U: General Characteristics Item Description: BODY DIA 4.562 IN.,O/A LG 5.812 IN.,HEIGHT 8.375 IN.,WIDTH 2.750 IN.,5.000 IN. BETWEEN MOUNTING HOLES,AND 4 HOLES 0.281 DIA. IN. 1 specification is 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.