The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-282-4120, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Niantic Tool, Inc. Dba Niantic Tool Co. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-282-4120 |
| Primary Part Number | 900030 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Niantic Tool, Inc. Dba Niantic Tool Co |
| Status | ACTIVE |
| 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 |
|---|---|
| 900030 PRIMARY | Niantic Tool, Inc. Dba Niantic Tool Co (USA) |
| B2300 PRIMARY | Niantic Tool, Inc. Dba Niantic Tool Co (USA) |
| Reference | Meaning |
|---|---|
| C3103 916680 | 5/9 Secondary reference U.S. Government activity |
| C3103 916680 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 916680 | 5/9 Secondary reference U.S. Government activity |
| C3103 916680 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 916680 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 916680 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
NSN 4820-01-282-4120 is a Valve,vacuum Breaking, manufactured by Niantic Tool, Inc. Dba Niantic Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-282-4120 has 2 manufacturer part numbers on file: 900030 (Niantic Tool, Inc. Dba Niantic Tool Co), B2300 (Niantic Tool, Inc. Dba Niantic Tool Co).
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-313-2815, 4320-01-644-0993. Verify interchangeability with system specifications before substitution.
Key specifications for 900030: Special Features: OD 2.000 IN. IN. 0 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.