The Cover, cataloged under National Stock Number 1020-01-033-7286, is classified within Federal Supply Class 1020 (Guns, Over 125mm Through 150mm) of the Weapons group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. 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. 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 | 1020-01-033-7286 |
| Primary Part Number | 3183270 |
| Item Name | Cover |
| FSC / FSG | 1020 / 10 — Guns, Over 125mm Through 150mm |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL COPPER ALLOY FED QQ-C-465 COMPOSITION 642,FINISH BLACK OXIDE COATING PER MIL-F-495,2.875 IN. SQUARE BY 1.375 IN. LG,1.000 IN. DIA HOLE THRU LENGTH,ONE END COUNTERBORED 1.375 IN. DIA BY 0.187 IN. DEEP CHAMFERED 0.031 IN. DEEP 45 DEG,OTHER END COUNTERBORED 0.050 IN. DEEP 1.305 IN. DIA,TWO INTERNAL CIRCULAR GROOVES,ONE GROOVE 0.188 IN. W BY 1.375 IN. DIA NEXT TO COUNTERBORE,OTHER GROOVE 0.218 IN. W BY 1.250 IN. DIA 0.262 IN. FROM FIRST GROOVE,ONE EXTERNAL GROOVE 0.187 IN. W BY 0.1257 IN. DEEP,SQUARE PORTION OF COVER IS 0.437 IN. THK,ROUND PORTION IS 2.4995 IN. DIA,SQUARE FLANGE HAS FOUR 0.406 IN. DIA MTG HOLES SPACED ON 3.187 IN. BOLT CIRCLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3183270 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 1020-01-033-7286 is a Cover, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1020, Guns, Over 125mm Through 150mm. Status: active.
NSN 1020-01-033-7286 has 1 manufacturer part number on file: 3183270 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-430-4329. Verify interchangeability with system specifications before substitution.
Key specifications for 3183270: General Characteristics Item Description: MATERIAL COPPER ALLOY FED QQ-C-465 COMPOSITION 642,FINISH BLACK OXIDE COATING PER MIL-F-495,2.875 IN. SQUARE BY 1.375 IN. LG,1.000 IN. DIA HOLE THRU LENGTH,ONE END COUNTERBORED 1.375 IN. DIA BY 0.187 IN. DEEP CHAMFERED 0.031 IN. DEEP 45 DEG,OTHER END COUNTERBORED 0.050 IN. DEEP 1.305 IN. DIA,TWO INTERNAL CIRCULAR GROOVES,ONE GROOVE 0.188 IN. W BY 1.375 IN. DIA NEXT TO COUNTERBORE,OTHER GROOVE 0.218 IN. W BY 1.250 IN. DIA 0.262 IN. FROM FIRST GROOVE,ONE EXTERNAL GROOVE 0.187 IN. W BY 0.1257 IN. DEEP,SQUARE PORTION OF COVER IS 0.437 IN. THK,ROUND PORTION IS 2.4995 IN. DIA,SQUARE FLANGE HAS FOUR 0.406 IN. DIA MTG HOLES SPACED ON 3.187 IN. BOLT CIRCLE 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.
NSN 1020-01-033-7286 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.