The Breech Mechanism, cataloged under National Stock Number 1035-01-475-1978, is classified within Federal Supply Class 1035 (Guns, Over 300mm) of the Weapons group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1035-01-475-1978 |
| Primary Part Number | 751-6402004 ITEM2L1 |
| Item Name | Breech Mechanism |
| FSC / FSG | 1035 / 10 — Guns, Over 300mm |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 751-6402004 ITEM2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6042006 ITEM2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402008 FIND 2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402002 FIND2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402004 FIND 2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402008-2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402002-2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402008 ITEM 2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402004-2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 211029484L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402006 FIND 2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402002 ITEM 2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402006-2L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 751-6402202 ASSEMBLY 97L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 751-6402002 FIND2 | 5/1 Secondary reference Naval Sea Systems Command |
| 751-6402002-2 | 5/1 Secondary reference Naval Sea Systems Command |
| 751-6402002 ITEM 2 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 211029484 | 5/1 Secondary reference Naval Sea Systems Command |
| 751-6402202 AY 97 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 1035-01-475-1978 is a Breech Mechanism, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 1035, Guns, Over 300mm. Status: active.
NSN 1035-01-475-1978 has 14 manufacturer part numbers on file: 751-6402004 ITEM2L1 (Naval Inventory Control Point Mechanicsburg), 751-6042006 ITEM2L1 (Naval Inventory Control Point Mechanicsburg), 751-6402008 FIND 2L1 (Naval Inventory Control Point Mechanicsburg), 751-6402002 FIND2L1 (Naval Inventory Control Point Mechanicsburg), 751-6402004 FIND 2L1 (Naval Inventory Control Point Mechanicsburg) and 9 more.
Key specifications for 751-6402004 ITEM2L1: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: INAVY BREECH DOOR AY MECH LH; End Item Identification: TORPEDO TUBE, SUBMERGED, UPR LH,MK69,MOD2;TORPEDO TUBE, SUMBERGED, UPR CENTER LH, MK69, MOD4;TORPEDO TUBE, SUBMERGED, LWR CTR LH, MK69, MOD6;TORPEDO TUBE, SUBMERGED, LWR LEFT HAND, MK69, MOD8; Reference Number Differentiating Characteristics: QUALITY CONTROL IN ACCORDANCE WITH 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 1035-01-475-1978 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.