The Thermocouple Gauge Tube, cataloged under National Stock Number 6635-01-003-8140, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6635-01-003-8140 |
| Item Name | Thermocouple Gauge Tube |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Status | ACTIVE |
| General Characteristics Item Description | 130 MA; 2-3/8 IN. LG; 1-1/4 IN. DIA; STD 1/8 IN. IPS MALE PIPE THD FOR MTG; BUILT IN AMBIENT COMPENSATION; THERMOPILE NOBLE METAL; RANGE,1 TO 1000 MICRONS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 555000000 | 3/9 Design control — primary reference Vacuum Instrument Corporation Dba Vic Leak Detection |
| DV1M | 5/9 Secondary reference Veeco Instruments Inc. Dba Upa Technology |
| 5550-000 | 5/9 Secondary reference Veeco Instruments Inc. Dba Upa Technology |
| 803007-1 | 5/9 Secondary reference U.S. Government activity |
| 5550-000-00 | 5/9 Secondary reference Veeco Instruments Inc. Dba Upa Technology |
NSN 6635-01-003-8140 is a Thermocouple Gauge Tube, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6145-01-509-0990. Verify interchangeability with system specifications before substitution.
Key specifications for 6635-01-003-8140: General Characteristics Item Description: 130 MA; 2-3/8 IN. LG; 1-1/4 IN. DIA; STD 1/8 IN. IPS MALE PIPE THD FOR MTG; BUILT IN AMBIENT COMPENSATION; THERMOPILE NOBLE METAL; RANGE,1 TO 1000 MICRONS 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.