The Arm,microphone, cataloged under National Stock Number 5965-00-256-8407, is classified within Federal Supply Class 5965 (Headsets, Handsets, Microphones and Speakers) of the Electrical and Electronic Equipment Components group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5965-00-256-8407 |
| Item Name | Arm,microphone |
| FSC / FSG | 5965 / 59 — Headsets, Handsets, Microphones and Speakers |
| Status | ACTIVE |
| Mounting Method | W/SWIVEL SLIDE AND DETENT ACTION |
| Overall Thickness | 2.000 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | MT-521A/U TYPE A |
| Test Data Document | 81349-MIL-M-5793 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | STEEL |
| Microphone Attachment Method | CLIP |
| 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 |
|---|---|
| CE266C | 3/2 Design control — primary reference U.S. Government activity |
| 1147 | 5/2 Secondary reference U.S. Government activity |
| MS25070 | 5/9 Secondary reference U.S. Government activity |
| MIL-M-5793 | 5/9 Secondary reference U.S. Government activity |
| MT-521A/U | 5/9 Secondary reference U.S. Government activity |
| 9951A | 5/9 Secondary reference U.S. Government activity |
| MT521AU | 5/9 Secondary reference U.S. Government activity |
| 46D40393 | 5/9 Secondary reference U.S. Government activity |
NSN 5965-00-256-8407 is a Arm,microphone, classified under FSC 5965, Headsets, Handsets, Microphones and Speakers. Status: active.
Key specifications for 5965-00-256-8407: Mounting Method: W/SWIVEL SLIDE AND DETENT ACTION; Overall Thickness: 2.000 INCHES NOMINAL IN; Overall Length: 9.000 INCHES NOMINAL IN; Overall Width: 1.250 INCHES NOMINAL IN. 6 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.