The Main Insert, cataloged under National Stock Number 5865-00-021-7129, is classified within Federal Supply Class 5865 (Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5865-00-021-7129 |
| Item Name | Main Insert |
| FSC / FSG | 5865 / 58 — Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 555024L1 | 5/1 Secondary reference Ainslie Corporation |
| 555024 | 3/1 Design control — primary reference Ainslie Corporation |
| 047074625 | 5/1 Secondary reference Parisi Associates Llc |
| 047074L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 047074625L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 047074 | 5/1 Secondary reference U.S. Government activity |
NSN 5865-00-021-7129 is a Main Insert, classified under FSC 5865, Electronic Countermeasures, Counter-countermeasures and Quick Reaction Capability Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-258-0451, 6220-01-292-7841, 2530-01-462-5817. Verify interchangeability with system specifications before substitution.
Key specifications for 5865-00-021-7129: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS. 2 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 5865-00-021-7129 has DEMIL Code B. 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.