The Transducer,ultrasonic Test, cataloged under National Stock Number 6635-01-353-7789, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. The manufacturer of record is Technisonic Research, Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6635-01-353-7789 |
| Primary Part Number | GRD-0502-HR |
| Item Name | Transducer,ultrasonic Test |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Manufacturer | Technisonic Research, Inc |
| Status | ACTIVE |
| Overall Diameter | 0.250 INCHES NOMINAL IN |
| Transmitter Frequency Rating | 5000.0 KILOHERTZ NOMINAL |
| 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 |
|---|---|
| GRD-0502-HR | Technisonic Research, Inc (USA) |
| Reference | Meaning |
|---|---|
| 124-660 | 3/9 Design control — primary reference Agfa Ndt Inc. Div Krautkramer Ultrasonics |
NSN 6635-01-353-7789 is a Transducer,ultrasonic Test, manufactured by Technisonic Research, Inc, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
NSN 6635-01-353-7789 has 1 manufacturer part number on file: GRD-0502-HR (Technisonic Research, Inc).
1 possible match (shared part number, not a government interchangeability claim): 2090-01-626-9323. Verify interchangeability with system specifications before substitution.
Key specifications for GRD-0502-HR: Overall Diameter: 0.250 INCHES NOMINAL IN; Special Features: DESIGNED FOR THICKNESS GAUGING AND FLAW DETECTION OF THIN MATERIALS;MOUNTING METHOD SCREW, PIN TERMINAL LOCATED ON THE SIDE; Transmitter Frequency Rating: 5000.0 KILOHERTZ NOMINAL. 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.