The Lead Complete,therm, cataloged under National Stock Number 6685-00-604-1979, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Lead Complete,therm |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Harcosemco Llc Dba Harcosemco (CAGE 00060) |
| Parameter | Value |
|---|---|
| NSN | 6685-00-604-1979 |
| Primary Part Number | 334946 |
| Item Name | Lead Complete,therm |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| 334946 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 334946 | Harcosemco Llc Dba Harcosemco (USA) |
| Reference | Meaning |
|---|---|
| 334947 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 334946 | 3/9 Design control — primary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 6685-00-604-1979 is a Lead Complete,therm, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-604-1979 has 2 manufacturer part numbers on file: 334946 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 334946 (Harcosemco Llc Dba Harcosemco).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-660-1416. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). 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.