The Standard,calibration,ultrasonic, cataloged under National Stock Number 6635-01-124-7399, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. The manufacturer of record is Critical Operations Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6635-01-124-7399 |
| Primary Part Number | 8140600-01 |
| Item Name | Standard,calibration,ultrasonic |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Manufacturer | Critical Operations Inc |
| Status | ACTIVE |
| General Characteristics Item Description | 15.00 IN. LG,10.00 IN. W,0.75 IN. THK,MATERIAL ALUMINUM ALLOY QQ-A-250/12 7075-T73 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 |
|---|---|
| 8140600-01 PRIMARY | Critical Operations Inc (USA) |
| 8140600-01 PRIMARY | Bright Lights Usa, Inc Dba Blusa Defense Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 8140600-01 | 5/9 Secondary reference U.S. Government activity |
| 8140600-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6635-01-124-7399 is a Standard,calibration,ultrasonic, manufactured by Critical Operations Inc, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
NSN 6635-01-124-7399 has 2 manufacturer part numbers on file: 8140600-01 (Critical Operations Inc), 8140600-01 (Bright Lights Usa, Inc Dba Blusa Defense Manufacturing).
1 possible match (shared part number, not a government interchangeability claim): 4920-01-318-8851. Verify interchangeability with system specifications before substitution.
Key specifications for 8140600-01: General Characteristics Item Description: 15.00 IN. LG,10.00 IN. W,0.75 IN. THK,MATERIAL ALUMINUM ALLOY QQ-A-250/12 7075-T73 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.