The Piston,valve, cataloged under National Stock Number 4820-01-135-2749, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Westerbeke Corporation. Government technical data includes 2 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. 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 | 4820-01-135-2749 |
| Primary Part Number | 16223 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Westerbeke Corporation |
| Status | ACTIVE |
| Outside Diameter | 1.480 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 16223 PRIMARY | Westerbeke Corporation (USA) |
NSN 4820-01-135-2749 is a Piston,valve, manufactured by Westerbeke Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-135-2749 has 1 manufacturer part number on file: 16223 (Westerbeke Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-412-7440, 6515-01-589-5090. Verify interchangeability with system specifications before substitution.
Key specifications for 16223: Outside Diameter: 1.480 INCHES NOMINAL IN; Overall Length: 1.845 INCHES NOMINAL IN; Material: STEEL. 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.
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.