The Handset, cataloged under National Stock Number 5965-00-644-0334, is classified within Federal Supply Class 5965 (Headsets, Handsets, Microphones and Speakers) of the Electrical and Electronic Equipment Components group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5965-00-644-0334 |
| Item Name | Handset |
| FSC / FSG | 5965 / 59 — Headsets, Handsets, Microphones and Speakers |
| Status | ACTIVE |
| Microphone Element Type | CARBON |
| Individual Connector Termination Type | LUG AND PIN |
| Operating Current Rating | 125.0 MILLIAMPERES NOMINAL |
| Conductor Quantity | 4 |
| DC Resistance Rating in Ohms | 40.0 NOMINAL |
| Power Source | BATTERY |
| Connector Identification | U-161()/U |
| Nondefinitive Spec/std Data | H-90/U TYPE |
| Earphone Element Type | MAGNETIC |
| Earphone Impedance Rating | 231.0 OHMS MINIMUM AND 281.0 OHMS MAXIMUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| H90U | 5/1 Secondary reference Lucent Technologies Inc Corporate Headquarters |
| M13253/5-01 | 2/2 Government specification standardization U.S. Government activity |
| H90U | 5/9 Secondary reference American Telephone and Telegraph Co |
| MIL-H-13253 | 5/9 Secondary reference U.S. Government activity |
| H-90()/U | 5/1 Secondary reference U.S. Government activity |
| H90U | 5/9 Secondary reference At and T Corp |
| MIL-H-13253/5 | 4/1 Identification reference U.S. Government activity |
NSN 5965-00-644-0334 is a Handset, classified under FSC 5965, Headsets, Handsets, Microphones and Speakers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5965-00-669-9146. Verify interchangeability with system specifications before substitution.
Key specifications for 5965-00-644-0334: Microphone Element Type: CARBON; Individual Connector Termination Type: LUG AND PIN; Operating Current Rating: 125.0 MILLIAMPERES NOMINAL; Conductor Quantity: 4. 10 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.