The Regulator,thermostatic Temperatu, cataloged under National Stock Number 4820-01-413-3254, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-413-3254 |
| Primary Part Number | 198-3427 |
| Item Name | Regulator,thermostatic Temperatu |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Operating Temp Rating | 95.0 CELSIUS NOMINAL DEGC |
| Thermostat Type | COIL SPRING BIMETALLIC |
| Usage Design | CONTROL WATER TEMPERATURE |
| Opening Temp Rating | 84.0 CELSIUS MINIMUM AND 86.0 CELSIUS MAXIMUM DEGC |
| 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 |
|---|---|
| 6I-4957 | Navantia Sa Sme. Div Navantia Hq (ESP) |
| 6I-4957 | Navantia - Propulsion Y Energia Motores - Cartagena (ESP) |
| 198-3427 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 6I4957 | 3/9 Design control — primary reference Caterpillar Inc Div Caterpillar Defense |
NSN 4820-01-413-3254 is a Regulator,thermostatic Temperatu, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-413-3254 has 3 manufacturer part numbers on file: 6I-4957 (Navantia Sa Sme. Div Navantia Hq), 6I-4957 (Navantia - Propulsion Y Energia Motores - Cartagena), 198-3427 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 198-3427: Operating Temp Rating: 95.0 CELSIUS NOMINAL DEGC; Thermostat Type: COIL SPRING BIMETALLIC; End Item Identification: ENGINE DIESEL P/N 3608/109-3839 USED ONBOARD 225 FT WLB COAST GUARD VESSELS FT; Usage Design: CONTROL WATER TEMPERATURE. 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.