The Base Assy,linkage, cataloged under National Stock Number 2040-01-487-3864, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 2040-01-487-3864 |
| Primary Part Number | 721-7286699-A3 |
| Item Name | Base Assy,linkage |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Functional Description | USED ON MISSILE TUBES 7 AND 8 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 721-7286699-A3 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H861-1506 | D/9 Drawing number reference only U.S. Government activity |
| 721-7286699 | D/9 Drawing number reference only Naval Sea Systems Command |
| H861-1506-A3 | 5/2 Secondary reference U.S. Government activity |
NSN 2040-01-487-3864 is a Base Assy,linkage, manufactured by Naval Sea Systems Command, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-487-3864 has 1 manufacturer part number on file: 721-7286699-A3 (Naval Sea Systems Command).
5 possible matches (shared part number, not a government interchangeability claim): 2040-01-487-3876, 2040-01-487-3881, 2040-01-487-3884. Verify interchangeability with system specifications before substitution.
Key specifications for 721-7286699-A3: Special Features: PART NUMBER 25 HAS A 25.3 DEGREE KEY ANGLE; Functional Description: USED ON MISSILE TUBES 7 AND 8; Part Name Assigned by Controlling Agency: MISSILE TUBE T-LOCK LINKAGE BASE ASSEMBLY; End Item Identification: NSSN CLASS SUBMARINE, VLS MISSILE TUBE MUZZLE HATCH LOCK MECHANISM ASSEMBLY. 1 specification is 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 2040-01-487-3864 has DEMIL Code D. 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.