The Ring,coding Disk, cataloged under National Stock Number 5815-00-021-4175, is classified within Federal Supply Class 5815 (Teletype and Facsimile Equipment) of the Communication, Detection, and Coherent Radiation 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3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5815-00-021-4175 |
| Item Name | Ring,coding Disk |
| FSC / FSG | 5815 / 58 — Teletype and Facsimile Equipment |
| Status | ACTIVE |
| FSC Application Data | RADIO TELEVISION COMMUNICATION EQUIPMENT NON AIRBORNE |
| Overall Diameter | 0.500 INCHES NOMINAL IN |
| Material | PLASTIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL C — Remove/Demil Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| B43651-1 | 3/9 Design control — primary reference Dar Electronics Inc Dba National Radio Co |
NSN 5815-00-021-4175 is a Ring,coding Disk, classified under FSC 5815, Teletype and Facsimile Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2915-00-452-8503. Verify interchangeability with system specifications before substitution.
Key specifications for 5815-00-021-4175: Overall Height: 0.088 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN; FSC Application Data: RADIO TELEVISION COMMUNICATION EQUIPMENT NON AIRBORNE; Overall Diameter: 0.500 INCHES NOMINAL IN; Overall Length: 0.632 INCHES MINIMUM AND 0.662 INCHES MAXIMUM IN. 3 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 5815-00-021-4175 has DEMIL Code C. 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.