The Excess Heater Assy, cataloged under National Stock Number 4520-01-512-9031, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-512-9031 |
| Primary Part Number | S9515-AL-MMA-010, 7-43 ITEM 15 |
| Item Name | Excess Heater Assy |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | WELDED HEATER WELL; INCLUDES 2 TEMPERATURE SENSORS (5905-01-512-5896 AN D 5905-01-512-5899) AND ONE HEATER ELEMENT (4540-01-287-0786) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| S9515-AL-MMA-010, 7-44 ITEM 1 | Naval Sea Systems Command (USA) |
| S9515-AL-MMA-010, 7-43 ITEM 15 PRIMARY | Naval Sea Systems Command (USA) |
| NV1014925-1 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| Reference | Meaning |
|---|---|
| SV778999-1 | 3/9 Design control — primary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
NSN 4520-01-512-9031 is a Excess Heater Assy, manufactured by Naval Sea Systems Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-512-9031 has 3 manufacturer part numbers on file: S9515-AL-MMA-010, 7-44 ITEM 1 (Naval Sea Systems Command), S9515-AL-MMA-010, 7-43 ITEM 15 (Naval Sea Systems Command), NV1014925-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for S9515-AL-MMA-010, 7-43 ITEM 15: General Characteristics Item Description: WELDED HEATER WELL; INCLUDES 2 TEMPERATURE SENSORS (5905-01-512-5896 AN D 5905-01-512-5899) AND ONE HEATER ELEMENT (4540-01-287-0786); Special Features: INTERCHANGABLE WITH 4520-01-512-9450, FEED HEATER ASSEMBLY; End Item Identification: VIRGINIA CLASS SSN. 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.