The O-Ring,dental Casting, cataloged under National Stock Number 6520-01-356-9745, is classified within Federal Supply Class 6520 (Dental Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Attachments International, Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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: PG.
| Parameter | Value |
|---|---|
| NSN | 6520-01-356-9745 |
| Primary Part Number | 99-443035 |
| Item Name | O-Ring,dental Casting |
| FSC / FSG | 6520 / 65 — Dental Instruments, Equipment, and Supplies |
| Manufacturer | Attachments International, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | 4.2 MM; WHITE; RUBBER; FINISHING; SHOCK ABSORBING; METAL TO RUBBR CONTACT,NO METAL TO METAL CONTACT; FIRST PLACED INTO THE O-RING GROOVE,THEN PLACED INTO THE FEMALE PORTION OF THE ATTACHMENT IN THE DENTURE FOR A TIGHT FIT; FOR USE WITH O-SO ATTACHMENT SYSTEM; UNIT QTY 12 PER PKG MM |
| 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 | PG |
| Part Number | Manufacturer |
|---|---|
| 99-443035 PRIMARY | Attachments International, Inc (USA) |
| Reference | Meaning |
|---|---|
| F92A207 | 5/1 Secondary reference Air Force Medical Logistics Office |
| 92-1-31-90 | 5/1 Secondary reference Air Force Medical Logistics Office |
| O-SO | 5/1 Secondary reference Attachments International, Inc |
NSN 6520-01-356-9745 is a O-Ring,dental Casting, manufactured by Attachments International, Inc, classified under FSC 6520, Dental Instruments, Equipment, and Supplies. Status: active.
NSN 6520-01-356-9745 has 1 manufacturer part number on file: 99-443035 (Attachments International, Inc).
1 possible match (shared part number, not a government interchangeability claim): 6520-01-357-5358. Verify interchangeability with system specifications before substitution.
Key specifications for 99-443035: General Characteristics Item Description: 4.2 MM; WHITE; RUBBER; FINISHING; SHOCK ABSORBING; METAL TO RUBBR CONTACT,NO METAL TO METAL CONTACT; FIRST PLACED INTO THE O-RING GROOVE,THEN PLACED INTO THE FEMALE PORTION OF THE ATTACHMENT IN THE DENTURE FOR A TIGHT FIT; FOR USE WITH O-SO ATTACHMENT SYSTEM; UNIT QTY 12 PER PKG MM; Part Name Assigned by Controlling Agency: O-RING DEN CASTING 4.2MM WHITE RUBBER FINISHING SHOCK ABS 12S MM. 1 specification is 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.