The Heater,thermowell, cataloged under National Stock Number 4540-01-203-4993, is classified within Federal Supply Class 4540 (Waste Disposal Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Chromalox Inc Dba Chromalox Precision Heat and Control, Inc. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Heater,thermowell |
| FSC / FSG | 4540 — Waste Disposal Equipment (FSG 45) |
| Manufacturers | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (CAGE 65586); Jige International (CAGE F9980); Soframe (CAGE FAFH7) |
| Parameter | Value |
|---|---|
| NSN | 4540-01-203-4993 |
| Primary Part Number | 265981 |
| Item Name | Heater,thermowell |
| FSC / FSG | 4540 / 45 — Waste Disposal Equipment |
| Manufacturer | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 265981 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| U0311460 | Jige International (FRA) |
| Y00024506 | Soframe (FRA) |
| Reference | Meaning |
|---|---|
| 265981 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4540-01-203-4993 is a Heater,thermowell, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4540, Waste Disposal Equipment. Status: active.
NSN 4540-01-203-4993 has 3 manufacturer part numbers on file: 265981 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), U0311460 (Jige International), Y00024506 (Soframe).
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.