The Mute,trombone, cataloged under National Stock Number 7720-01-539-5523, is classified within Federal Supply Class 7720 (Musical Instrument Parts and Accessories) of the Musical Instruments, Phonographs group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 7720-01-539-5523 |
| Item Name | Mute,trombone |
| FSC / FSG | 7720 / 77 — Musical Instrument Parts and Accessories |
| Status | ACTIVE |
| Unit Type | STRAIGHT |
| Material | ALUMINUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| JR TRB 1C | 3/9 Design control — primary reference Jo-Ral |
NSN 7720-01-539-5523 is a Mute,trombone, classified under FSC 7720, Musical Instrument Parts and Accessories. Status: active.
Key specifications for 7720-01-539-5523: Unit Type: STRAIGHT; Special Features: WITH ITS UNIQUE SHAPE THIS MUTE PRODUCES A SMOOTHER,RICHER SOUND FOR TENOR TROMBONES.LINED WITH NEOPRENE RUBBER RIM THATS ELIMINATES VIBRATIONS,THE ADJUSTABLE CUP WILL NEVER LOOSEN OR DROP OFF.IT IS EASILY INSTALLED BY SIMPLY MOVING THE CUP UP TO THE DESIRED LENGTH FOR A TIGHT FIT,THE CORKS MAY BE RESHAPED FOR OPTIMAL ACOUSTICAL PLACEMENT; Part Name Assigned by Controlling Agency: TENOR TROMBONE STRAIGHT MUTE; Material: ALUMINUM. 2 specifications are documented in the U.S. Government catalog.
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.