The Test Set Subassembly,humidity-Pr, cataloged under National Stock Number 6685-01-498-3979, 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 Dh Instruments 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 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 | 6685-01-498-3979 |
| Primary Part Number | 401580 |
| Item Name | Test Set Subassembly,humidity-Pr |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Dh Instruments Inc. |
| Status | ACTIVE |
| Component Quantity | 4 |
| Major Components | 0-RING(P/N102758) VITON 1, SYRINGE(P/N 102817) 1, MAT OPG1(P/N 122998) 1, ASSY, SEBACATE QUART (P/N 400503) 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 401580 PRIMARY | Dh Instruments Inc. (USA) |
NSN 6685-01-498-3979 is a Test Set Subassembly,humidity-Pr, manufactured by Dh Instruments Inc., classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-498-3979 has 1 manufacturer part number on file: 401580 (Dh Instruments Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-632-5126. Verify interchangeability with system specifications before substitution.
Key specifications for 401580: Component Quantity: 4; Major Components: 0-RING(P/N102758) VITON 1, SYRINGE(P/N 102817) 1, MAT OPG1(P/N 122998) 1, ASSY, SEBACATE QUART (P/N 400503) 1; Special Features: PRIMES PUMP FOR TESTER PRESSURE GAUGE GENERATOR; End Item Identification: 6685014708667. 2 specifications are documented in the U.S. Government catalog.
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.