The Filter,light,cathode Ray Tube, cataloged under National Stock Number 6625-00-421-0621, is classified within Federal Supply Class 6625 (Electrical and Electronic Properties Measuring and Testing Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6625-00-421-0621 |
| Item Name | Filter,light,cathode Ray Tube |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Status | ACTIVE |
| Overall Thickness | 0.093 INCHES NOMINAL IN |
| Color | BLUE |
| Material | GELATIN AND GLASS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | XN |
| Reference | Meaning |
|---|---|
| 87756 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6625-00-421-0621 is a Filter,light,cathode Ray Tube, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 6110-01-028-4616, 5315-01-265-6964, 5305-01-621-2013. Verify interchangeability with system specifications before substitution.
Key specifications for 6625-00-421-0621: Overall Thickness: 0.093 INCHES NOMINAL IN; Overall Length: 4.812 INCHES NOMINAL IN; Overall Width: 1.625 INCHES NOMINAL IN; Color: BLUE. 3 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.