The Door,breech, cataloged under National Stock Number 2040-01-220-9964, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2040-01-220-9964 |
| Item Name | Door,breech |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Status | ACTIVE |
| General Characteristics Item Description | COPPER ALLOY,MIL-B-21230,ALLOY 955; CHROME PLATE,QQ-C-320,CL 1,TY 1; 6 EARS EQUALLY SPACED,13.250 IN. O/A DIA,2 HINGES; 1 HANDLE,4.000 IN. LG,1.250 IN. W IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SSN594-609-2127595 PIECE 1 | 3/2 Design control — primary reference U.S. Government activity |
| 609-2127595 PIECE 1 | 5/9 Secondary reference U.S. Government activity |
| 609-2127595 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| SSN594-609-2127595 PIECE 1 | 5/9 Secondary reference U.S. Government activity |
NSN 2040-01-220-9964 is a Door,breech, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5330-01-223-5636. Verify interchangeability with system specifications before substitution.
Key specifications for 2040-01-220-9964: General Characteristics Item Description: COPPER ALLOY,MIL-B-21230,ALLOY 955; CHROME PLATE,QQ-C-320,CL 1,TY 1; 6 EARS EQUALLY SPACED,13.250 IN. O/A DIA,2 HINGES; 1 HANDLE,4.000 IN. LG,1.250 IN. W IN. 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.
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.