The Testing Machine,vibration Fatigu, cataloged under National Stock Number 6635-01-321-1668, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. The manufacturer of record is Trig-Tek, Incorporated. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6635-01-321-1668 |
| Primary Part Number | 623B |
| Item Name | Testing Machine,vibration Fatigu |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Manufacturer | Trig-Tek, Incorporated |
| Status | ACTIVE |
| Functional Classification | AA-8.13 |
| Functional Description | MONITORS & ANALYZES TURBOJET, TURBOPROP AND TURBOFAN ENGINE VIBRATION |
| 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 |
|---|---|
| 623B PRIMARY | Trig-Tek, Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 3186 | 5/9 Secondary reference Trig-Tek, Incorporated |
NSN 6635-01-321-1668 is a Testing Machine,vibration Fatigu, manufactured by Trig-Tek, Incorporated, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
NSN 6635-01-321-1668 has 1 manufacturer part number on file: 623B (Trig-Tek, Incorporated).
Key specifications for 623B: Overall Height: 8.750 INCHES NOMINAL IN; Overall Width: 19.000 INCHES NOMINAL IN; Functional Classification: AA-8.13; Special Features: 14.500 IN. DEEP; C/O 6 IDENTICAL MONITORING CHANNELS IN. 2 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.