The Coupling Half,valve Stem, cataloged under National Stock Number 4820-01-135-1370, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-135-1370 |
| Primary Part Number | 209-5201915PC9 |
| Item Name | Coupling Half,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | NICKEL-COPPER-ALUMINUM,QQ-N-286,CL A,ANL AND AH,CD OR HF; 4 IN. DIA; FOR 12 IN. SUCTION AND DISCHARGE VALVE IN |
| 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 |
|---|---|
| 209-5201915PC9 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 209-5201915PC9 | C/1 Advisory reference — outside the item-of-supply concept Huntington Ingalls Inc Div Newport News Shipbuilding |
| 209-5201915 | D/9 Drawing number reference only Naval Sea Systems Command |
| 6551-1355 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 803-4384539-X-0 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 209-5201915 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-135-1370 is a Coupling Half,valve Stem, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-135-1370 has 1 manufacturer part number on file: 209-5201915PC9 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-325-9030. Verify interchangeability with system specifications before substitution.
Key specifications for 209-5201915PC9: General Characteristics Item Description: NICKEL-COPPER-ALUMINUM,QQ-N-286,CL A,ANL AND AH,CD OR HF; 4 IN. DIA; FOR 12 IN. SUCTION AND DISCHARGE VALVE 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.
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.