The Gasket,standard Optical, cataloged under National Stock Number 6540-01-516-6980, is classified within Federal Supply Class 6540 (Ophthalmic Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Opticast Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6540-01-516-6980 |
| Primary Part Number | G-7.9-25/50 |
| Item Name | Gasket,standard Optical |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Opticast Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| G-7.9-25/50 PRIMARY | Opticast Inc (USA) |
| Reference | Meaning |
|---|---|
| 6540NCM032212 | 5/1 Secondary reference Defense Medical Standardization Board |
| 03-2625 | 5/1 Secondary reference U.S. Government activity |
NSN 6540-01-516-6980 is a Gasket,standard Optical, manufactured by Opticast Inc, classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-516-6980 has 1 manufacturer part number on file: G-7.9-25/50 (Opticast Inc).
Key specifications for G-7.9-25/50: Special Features: REPLACEMENT FOR GASKET WITHIN PART NUMBER: GS-90-5, NSN 6540-01-507-3519, GASKET SET, STANDARD OPTICAL; Part Name Assigned by Controlling Agency: GASKET OPTICAL STANDARD 7.9-25/50 (1) PER PACKAGE; End Item Identification: FOR USE WITH NSN 6540-01-507-3519, GASKET SET, STANDARD OPTICAL. 0 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.