The Extension Arms,portable Dental U, cataloged under National Stock Number 6520-01-555-8975, is classified within Federal Supply Class 6520 (Dental Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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. Unit of issue: EA.
| Item Name | Extension Arms,portable Dental U |
| FSC / FSG | 6520 — Dental Instruments, Equipment, and Supplies (FSG 65) |
| Parameter | Value |
|---|---|
| NSN | 6520-01-555-8975 |
| Item Name | Extension Arms,portable Dental U |
| FSC / FSG | 6520 / 65 — Dental Instruments, Equipment, and Supplies |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| 4671 | 3/2 Design control — primary reference U.S. Government activity |
| 6520NCM071775 | 5/1 Secondary reference Defense Medical Standardization Board |
| 9100223 | 5/9 Secondary reference Bell Dental Products, Llc |
NSN 6520-01-555-8975 is a Extension Arms,portable Dental U, classified under FSC 6520, Dental Instruments, Equipment, and Supplies. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5975-01-668-9405. Verify interchangeability with system specifications before substitution.
Key specifications for 6520-01-555-8975: Special Features: EXTENSION ARMS FOR DEFTOS III PORTABLE DENTAL AND OPERATING UNIT, NSN: 6520-01-546-5077; Part Name Assigned by Controlling Agency: EXTENSION ARMS F/DEFTOS III PORTABLE DENTAL. 0 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.