The Valve,tee, cataloged under National Stock Number 4820-01-375-3513, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-375-3513 |
| Primary Part Number | 74631F91 |
| Item Name | Valve,tee |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am |
| Status | ACTIVE |
| Style Designator | TEE W/OFFSET |
| Bonnet Type | INSIDE SCREW |
| Maximum Operating Temp | 200.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | THREADED |
| Material | COPPER ALLOY BODY |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 74631F91 PRIMARY | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am (USA) |
| 74631F91 | Isotta Fraschini Motori Spa (ITA) |
| Reference | Meaning |
|---|---|
| 74631F91 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
NSN 4820-01-375-3513 is a Valve,tee, manufactured by Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-375-3513 has 2 manufacturer part numbers on file: 74631F91 (Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am), 74631F91 (Isotta Fraschini Motori Spa).
Key specifications for 74631F91: Style Designator: TEE W/OFFSET; Bonnet Type: INSIDE SCREW; Maximum Operating Temp: 200.0 FAHRENHEIT SINGLE RESPONSE DEGF; Special Features: VALVE SIZE 0.125 IN. IN. 6 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.