The Valve,air Venting,steam, cataloged under National Stock Number 4520-01-485-9875, 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 4 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-485-9875 |
| Primary Part Number | 556-7106779-62 |
| Item Name | Valve,air Venting,steam |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Valve Air Return Prevention | NOT REQUIRED |
| Valve Shape | STRAIGHT |
| Valve Type | STEAM RADIATOR AIR VENT |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 556-7106779-62 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H792-8002-62 | 5/2 Secondary reference U.S. Government activity |
NSN 4520-01-485-9875 is a Valve,air Venting,steam, manufactured by Naval Sea Systems Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-485-9875 has 1 manufacturer part number on file: 556-7106779-62 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-733-8963. Verify interchangeability with system specifications before substitution.
Key specifications for 556-7106779-62: Valve Air Return Prevention: NOT REQUIRED; Overall Length: 1.250 INCHES NOMINAL IN; Valve Shape: STRAIGHT; Special Features: HEXHEAD WIDTH 0.44X0.38, EXTERNAL THREADED AREA .312-18-2A, MATERAIL SPEC. QQ-N-286, DRILLED HOLES THROUGH OUT FOR RELIEF. A. 4 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.
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.