The Mask,optical Instrument, cataloged under National Stock Number 6070-01-437-4139, is classified within Federal Supply Class 6070 (Fiber Optic Accessories and Supplies) of the Fiber Optics Materials, Components, Assemblies, and Accessories group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 6070-01-437-4139 |
| Item Name | Mask,optical Instrument |
| FSC / FSG | 6070 / 60 — Fiber Optic Accessories and Supplies |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| RM-500 | 3/9 Design control — primary reference Vytran Corporation |
NSN 6070-01-437-4139 is a Mask,optical Instrument, classified under FSC 6070, Fiber Optic Accessories and Supplies. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4630-01-564-0516. Verify interchangeability with system specifications before substitution.
Key specifications for 6070-01-437-4139: Special Features: 500 UM; REPLACEABLE RECOAT; End Item Identification: USED ON FFS-1000 SPLICING SYSTEM. 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.
NSN 6070-01-437-4139 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.